diff --git a/.claude/tasks/TODO.md b/.claude/tasks/TODO.md
index a61c1f3..4d77961 100644
--- a/.claude/tasks/TODO.md
+++ b/.claude/tasks/TODO.md
@@ -69,3 +69,24 @@ Branch: feature/apt-packages (off develop). Source: apt-mark showmanual + /var/l
 - [x] install_nvidia_driver(): lspci vendor 10de gate + ubuntu-drivers install (approved: no version pin)
 - [x] README steps 11 + packages; shellcheck + bash -n; stub run of the NVIDIA helper
 - [x] commit on the feature branch. No finish without explicit signal.
+
+## Feature — macOS support, parity with Linux minus apt (2026-10-05)
+Branch: feature/macos-support (off develop). User choices: Docker = colima + CLI; login shell → brew bash 5.
+- [x] install.sh: Darwin block — ensure Homebrew, brew update/upgrade, brew formula list mirroring apt list
+- [x] install.sh: colima + docker CLI (compose/buildx plugin dir), code-server + mariadb via brew services
+- [x] install.sh: brew bash → /etc/shells + chsh; ~/.bash_profile sources ~/.bashrc (Terminal = login shell)
+- [x] install.sh: `cp -rupv` → `cp -Rpv` (BSD cp has no -u; target dir is fresh anyway)
+- [x] install.sh: end-of-run report of Linux items not installed on macOS
+- [x] bash/bashrc-osx: mirror bashrc-linux (ls -G, brew shellenv, EPOCHREALTIME timer, dtach_claude w/o systemd-run)
+- [x] bin/dt: portable _cwd_of (lsof) + _starttime_of (BSD date), help sed -E
+- [x] README + CLAUDE.md macOS section
+- [x] shellcheck + bash -n; runtime test bashrc-osx + dt on this Mac; stub run of Darwin block
+
+## Feature — macOS: choose zsh (oh-my-zsh) or bash as login shell (2026-10-05)
+Same branch. Prompt at start of Darwin block (MACOS_SHELL=bash|zsh env overrides, no TTY → bash).
+- [x] zsh/zshrc-osx: brew env, PATH, history, GCC_COLORS, VIUSER, cc/d + dtach-router, oh-my-zsh, ~/.zshrc.local hook
+- [x] zsh/bchanot.zsh-theme: same prompt as bashrc (✔/✘ + timer, user [ cwd ], git [branch -*+], root red)
+- [x] install.sh: choose_macos_shell, install_oh_my_zsh (unattended, keep zshrc), deploy_zsh_config (backup → Oldconfig)
+- [x] install.sh: use_brew_bash_login_shell → set_login_shell <path>, called at end with chosen shell
+- [x] README + CLAUDE.md
+- [x] shellcheck/bash -n/zsh -n; runtime: theme in zsh (prompt render, timer, git bits), dtach-router sourced in zsh; harness both choices
diff --git a/CLAUDE.md b/CLAUDE.md
index a1c910a..28aa7ea 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -21,6 +21,7 @@ vim/vimrc             vim config (pathogen, molokai, syntastic, NERDTree)
 vim/autoload/         pathogen loader (committed)
 vim/colors/           molokai colorscheme (committed)
 bash/bashrc-{linux,osx}          OS-detected bashrc
+zsh/{zshrc-osx,bchanot.zsh-theme}  macOS zsh option: oh-my-zsh zshrc + theme porting the bash prompt
 bin/{dt,dtach-router,claude-provider}   CLI scripts deployed to ~/.local/bin
 etc/profile.d/disk-usage-warning.sh     login-time low-disk warning → /etc/profile.d (Linux only)
 etc/tmpfiles.d/tmp.conf                 disk-backed /tmp cleanup rules (offer: /tmp on disk)
@@ -37,6 +38,12 @@ cloudpex/{cloudpex,install.sh,README.md} on-demand SMB mount helper → /usr/loc
 `/tmp` is a RAM-backed tmpfs on Ubuntu (50% of RAM): agent runs fill it, which is why
 install.sh offers to mask `tmp.mount`. Swap is not the fix (the cap and ENOSPC stay).
 
+macOS: install.sh swaps apt-get for Homebrew (colima for Docker, brew services for
+code-server/mariadb, `~/.bash_profile` → `~/.bashrc`), asks bash or zsh (`MACOS_SHELL`
+presets it; zsh = oh-my-zsh + `zsh/` files, bash = brew bash 5) and prints the Linux-only
+items it skipped. Keep `bashrc-osx` = `bashrc-linux` + macOS deltas only, and the zsh
+files in step with them (same env, aliases, prompt).
+
 `pymupdf`/`markdown_py` are NOT tracked — they are pipx entry-point shims,
 recreated by `pipx install PyMuPDF Markdown` in install.sh.
 `claude-provider` reads `$OPENROUTER_API_KEY` from the env — never hardcode it (the
diff --git a/README.md b/README.md
index 1561106..d03270d 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ curl -fsSL https://git.bchanot.fr/bchanot/config/raw/branch/master/remote-instal
 
 | Path                 | Purpose                                                        |
 | -------------------- | -------------------------------------------------------------- |
-| `install.sh`         | Installs apt packages + Docker + code-server + RDP (gnome-remote-desktop), backs up old config, deploys vim + bashrc (OS-detected), installs CLI scripts, pipx tools, a low-disk login warning and the `cloudpex` NAS mount helper; ends by offering two system changes (`/tmp` on disk, SSH memory guard). |
+| `install.sh`         | Linux: installs apt packages + Docker + code-server + RDP (gnome-remote-desktop), backs up old config, deploys vim + bashrc (OS-detected), installs CLI scripts, pipx tools, a low-disk login warning and the `cloudpex` NAS mount helper; ends by offering two system changes (`/tmp` on disk, SSH memory guard). macOS: same tooling through Homebrew (see [macOS](#macos)), then prints what was not installed compared with Linux. |
 | `cloudpex/`          | On-demand SMB mount of a NAS share (`cloudpex` command + its installer). Site values (host, share, SMB user, mount point, SMB version) are prompted at install and stored in `/etc/cloudpex.conf`, never in the script. French README inside. |
 | `etc/tmpfiles.d/tmp.conf` | Cleanup rules for a disk-backed `/tmp` (wiped at boot, 10-day purge). Deployed by the `/tmp` on disk offer. |
 | `etc/systemd/ssh.service.d/override.conf` | `ssh.service` drop-in: sshd exempt from the OOM killer + memory reclaim protection. Deployed by the SSH memory guard offer. |
@@ -28,7 +28,9 @@ curl -fsSL https://git.bchanot.fr/bchanot/config/raw/branch/master/remote-instal
 | `vim/autoload/`      | `pathogen.vim` plugin loader (committed).                      |
 | `vim/colors/`        | `molokai.vim` colorscheme (committed).                         |
 | `bash/bashrc-linux`  | bashrc for desktop Linux (git-aware prompt + command timer).   |
-| `bash/bashrc-osx`    | bashrc for macOS.                                              |
+| `bash/bashrc-osx`    | bashrc for macOS: `bashrc-linux` adapted (Homebrew on `PATH`, BSD `ls -G`, bash 5 clock for the timer, `cc` without `systemd-run`). |
+| `zsh/zshrc-osx`      | zshrc for macOS when zsh is chosen: oh-my-zsh + the same env, aliases and dtach menu as `bashrc-osx`. Loads `~/.zshrc.local` for machine-specific lines. |
+| `zsh/bchanot.zsh-theme` | oh-my-zsh theme reproducing the bash prompt: `✔ (12ms) user [ ~/dir ] [branch -*+] >`. |
 | `bin/dt`             | dtach session manager for claude-in-dtach sessions.            |
 | `bin/dtach-router`   | Dashboard to resume dtach sessions, shown at the start of every interactive shell (wired into `~/.bashrc` by the installer). |
 | `bin/claude-provider`| Switch Claude Code between Anthropic and OpenRouter.           |
@@ -57,14 +59,14 @@ No argument — the OS is auto-detected.
 
 What it does:
 
-1. On Debian/Ubuntu, installs a set of CLI/dev packages via `apt-get` (see below). Skipped automatically where `apt-get` is absent (macOS).
+1. On Debian/Ubuntu, installs a set of CLI/dev packages via `apt-get` (see below). On macOS, Homebrew does it instead: see [macOS](#macos).
 2. Sets up Docker's official apt repo (Ubuntu) and installs the engine + compose plugin — skipped if `docker` is already present.
 3. Moves any existing `~/.vim`, `~/.vimrc`, `~/.bashrc`, `~/.Sublivim` to `~/Oldconfig`.
 4. Clones the `syntastic` and `nerdtree` vim plugins into `~/.vim/bundle/`.
 5. Copies the tracked vim files into `~/.vim` and symlinks `~/.vimrc`.
 6. Picks the bashrc by OS: macOS → `bashrc-osx` (falls back to `bashrc-linux` if missing), everything else → `bashrc-linux`. Copies it to `~/.bashrc`.
 7. Installs Python CLIs via `pipx` (`PyMuPDF` → `pymupdf`, `Markdown` → `markdown_py`) — skipped if `pipx` is absent.
-8. Copies the `bin/` scripts (`dt`, `dtach-router`, `claude-provider`) into `~/.local/bin`. The dtach session-resume menu ships in the deployed `bashrc-linux`, so every interactive shell offers it — including VS Code Remote-SSH terminals, which are non-login and never read `~/.profile`. The installer also strips any older dtach block left in `~/.profile` so a plain SSH login doesn't prompt twice.
+8. Copies the `bin/` scripts (`dt`, `dtach-router`, `claude-provider`) into `~/.local/bin`. The dtach session-resume menu ships in the deployed bashrc (both OSes), so every interactive shell offers it — including VS Code Remote-SSH terminals, which are non-login and never read `~/.profile`. The installer also strips any older dtach block left in `~/.profile` so a plain SSH login doesn't prompt twice.
 9. On Linux, installs `etc/profile.d/disk-usage-warning.sh` to `/etc/profile.d/` (needs `sudo`) so each login warns when `/` or `/home` cross 85% usage.
 10. On Linux, installs **code-server** (VS Code in the browser) via its vendor script — skipped if already present — and enables the `code-server@$USER` systemd service.
 11. On Linux, installs **`ubuntu-desktop-minimal`** (GDM + GNOME Shell, ~1.5 GB): the RDP remote login below hands out a GNOME session, which a bare server install does not have. Then sets up **RDP remote login** via `gnome-remote-desktop` (Wayland-native): installs the daemon + `openssl`, generates a self-signed TLS cert once, and prompts interactively for shared "gate" credentials (skipped when no terminal is attached, or already set). Disables `xrdp` if present; opens UFW port `3389` only when UFW is already active. Finally, when `lspci` sees an NVIDIA GPU, runs `ubuntu-drivers install` to put on the driver the distro recommends for the card (no version pinned; loads at the next reboot). Skipped on machines without an NVIDIA GPU.
@@ -90,7 +92,20 @@ What it does:
 
 The script is re-runnable: each run re-backs up to `~/Oldconfig` (overwriting the previous backup), re-clones plugins, skips Docker if already installed, and re-deploys the `bin/` scripts.
 
-> Notes: the package list is Debian/Ubuntu-specific, and the Docker repo step assumes **Ubuntu**. On macOS the whole `apt-get` block is skipped — install `vim`/`git`/toolchain via Homebrew yourself.
+> Note: the Docker repo step assumes **Ubuntu**.
+
+### macOS
+
+The same `./install.sh` detects macOS and replaces `apt-get` with Homebrew. It first asks which login shell you want, **bash** or **zsh** (`[bash]` by default; answer in advance with `MACOS_SHELL=zsh ./install.sh`, and with no terminal attached it picks bash):
+
+1. Installs Homebrew with its official script when `brew` is missing (this also pulls the Xcode Command Line Tools: clang, make, git), then `brew update` + `brew upgrade`.
+2. Installs the apt list mapped to formulae: `vim git git-lfs git-filter-repo gitleaks pkgconf shellcheck gh curl gnupg lftp inetutils unzip tree tmux fzf dtach node python pipx php mariadb imagemagick ffmpeg weasyprint poppler qpdf webp libavif bash`. Brew's `php` already ships gd, mbstring, xml, intl, curl and mysql.
+3. Docker: `colima` (the Linux VM) + `docker docker-compose docker-buildx`. Writes `~/.docker/config.json` with `cliPluginsExtraDirs` so `docker compose` works, only when that file does not exist yet (otherwise prints the line to add).
+4. Starts `colima`, `code-server` and `mariadb` as `brew services` (the `systemctl enable --now` equivalent), skipping any already started.
+5. Deploys `bashrc-osx`, then appends one line to `~/.bash_profile` that sources `~/.bashrc`: macOS terminals open login shells, which never read `~/.bashrc` on their own. Done for both choices, so `bash` stays usable.
+6. **bash** chosen: makes brew's bash 5 the login shell (adds it to `/etc/shells` with `sudo`, then `chsh`, which asks for your password). macOS ships bash 3.2, too old for the bashrc.
+   **zsh** chosen: installs oh-my-zsh with its official script (unattended, skipped if `~/.oh-my-zsh` exists), deploys `zsh/zshrc-osx` to `~/.zshrc` and the `bchanot` theme to `~/.oh-my-zsh/custom/themes/`, then makes `/bin/zsh` the login shell. An existing `~/.zshrc` that differs from the repo's is saved as `~/.zshrc.backup-<date>` (outside `~/Oldconfig`, which every run wipes). Move your machine-specific lines (nvm, bun, tokens) into `~/.zshrc.local`: the deployed zshrc loads it.
+7. Ends with the list of what the Linux install has and this one does not: `gcc` (Apple clang answers to `gcc`), `valgrind`, `dkms`, `net-tools`, `openssh-server` and the RDP desktop (both built into macOS, switched on in System Settings > Sharing), `cifs-utils`, `php-imagick`, the NVIDIA driver, the disk-usage warning, `cloudpex`, the security baseline and the two end-of-install offers.
 
 ### CLI scripts (`bin/`)
 
@@ -107,8 +122,8 @@ Deployed to `~/.local/bin` (the deployed bashrc adds this dir to `PATH`):
 ## Requirements
 
 - `bash`, `git`
-- Debian/Ubuntu `apt-get` for the package step (optional elsewhere)
-- A `bash` login shell (zsh users: switch to bash for these prompts to apply)
+- Debian/Ubuntu `apt-get`, or macOS (Homebrew is installed if missing)
+- A `bash` login shell on Linux (zsh users switch to bash for these prompts to apply). On macOS the installer sets bash or zsh, your choice
 
 ## License
 
diff --git a/bash/bashrc-osx b/bash/bashrc-osx
index 892362c..3695316 100644
--- a/bash/bashrc-osx
+++ b/bash/bashrc-osx
@@ -1,19 +1,18 @@
+# Homebrew on PATH (Apple Silicon: /opt/homebrew, Intel: /usr/local).
+# Must come first: brew's bash, vim, git, fzf and dtach shadow the system ones.
+for brew_bin in /opt/homebrew/bin/brew /usr/local/bin/brew; do
+	if [ -x "$brew_bin" ]; then
+		eval "$("$brew_bin" shellenv)"
+		break
+	fi
+done
+unset brew_bin
+
 ## Enable color support of ls and also add handy aliases
-# Some colors
+# Some colors (BSD ls: -G instead of GNU --color)
 alias ls='ls -G'
 alias grep='grep --color=auto'
 
-# Some utils aliases
-alias ll='ls -l'
-alias la='ls -A'
-alias rmrf='rm -rf'
-alias gcl='git clone'
-alias vim='vim -p'
-
-# Aliases for executing ~/.script scripts
-alias gitan='sh ~/.script/gitan.sh'
-alias clean='sh ~/.script/clean.sh'
-
 ## Some export
 # colored GCC warnings and errors
 export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'
@@ -24,9 +23,21 @@ case ":$PATH:" in
 	*) export PATH="$HOME/.local/bin:$PATH" ;;
 esac
 
+# Set history size to unlimited
+if [[ $EUID == 0 ]] ; then
+	export HISTSIZE=0
+	export HISTFILESIZE=0
+else
+	export HISTSIZE=-1
+	export HISTFILESIZE=-1
+fi
+
+#export LANG=en_US.UTF-8
+
+
 # Used for vim header
-export VIUSER=xuser
-export VIMAIL=xuser@student.42.fr
+export VIUSER=bchanot
+export VIMAIL=bchanot@gmail.fr
 
 ## Activate and custom bash completion
 #bind 'TAB:menu-complete'
@@ -44,7 +55,38 @@ function parse_git_branch() {
 			echo ""
 	fi
 }
+# BSD date has no %N: use bash 5's microsecond clock, scaled to nanoseconds.
+# Falls back to whole seconds under the system bash 3.2.
+function timer_now {
+    if [ -n "${EPOCHREALTIME:-}" ]; then
+        echo "${EPOCHREALTIME/[.,]/}000"
+    else
+        echo "$(date +%s)000000000"
+    fi
+}
 
+function timer_start {
+    timer_start=${timer_start:-$(timer_now)}
+}
+
+function timer_stop {
+    local delta_us=$((($(timer_now) - $timer_start) / 1000))
+    local us=$((delta_us % 1000))
+    local ms=$(((delta_us / 1000) % 1000))
+    local s=$(((delta_us / 1000000) % 60))
+    local m=$(((delta_us / 60000000) % 60))
+    local h=$((delta_us / 3600000000))
+    # Goal: always show around 3 digits of accuracy
+    if ((h > 0)); then timer_show=${h}h${m}m
+    elif ((m > 0)); then timer_show=${m}m${s}s
+    elif ((s >= 10)); then timer_show=${s}.$((ms / 100))s
+    elif ((s > 0)); then timer_show=${s}.$(printf %03d $ms)s
+    elif ((ms >= 100)); then timer_show=${ms}ms
+    elif ((ms > 0)); then timer_show=${ms}.$((us / 100))ms
+    else timer_show=${us}us
+    fi
+    unset timer_start
+}
 # get current status of git repo
 function parse_git_dirty {
 	status=`git status 2>&1 | tee`
@@ -72,6 +114,35 @@ function parse_git_dirty {
 	fi
 }
 
-export PS1='`if [ $? = 0 ]; then echo "\[\033[01;36m\]✔"; else echo "\[\033[01;31m\]✘"; fi` \[\033[32m\]\w\[\033[34m\]$(parse_git_branch " %s") \[\033[0m\]>\[\033[00m\] '
+function set_prompt {
+	timer_stop
 
+	if [[ $EUID == 0 ]] ; then
+		export PS1='`if [ $? = 0 ]; then echo "\[\033[01;36m\]✔"; else echo "\[\033[01;31m\]✘"; fi` ($timer_show) \[\033[01;31m\]\u [\[\033[00;0m\] \w \[\033[01;31m\]]\[\033[01;34m\]$(parse_git_branch " %s") \[\033[00;00m\]> '
+	else
+		export PS1='`if [ $? = 0 ]; then echo "\[\033[01;36m\]✔"; else echo "\[\033[01;31m\]✘"; fi` ($timer_show) \[\033[01;32m\]\u [\[\033[00;0m\] \w \[\033[01;32m\]]\[\033[01;34m\]$(parse_git_branch " %s") \[\033[00;00m\]> '
+	fi
+}
+
+trap 'timer_start' DEBUG
+PROMPT_COMMAND='set_prompt'
 ## Lancement des commandes au demarrages
+
+# claude-dans-dtach : creer une session (claude tournant dans dtach, detache via Ctrl-\).
+# Usage : cd ~/projets/seo && cc seo   -> session nommee "seo".
+# Pas de systemd sur macOS : dtach est lance directement (pas de slice cgroup).
+dtach_claude() {
+  local name="${1:-claude-$(date +%H%M%S)}"
+  mkdir -p "$HOME/.dtach"
+  dtach -c "$HOME/.dtach/${name}" -e '^\' \
+      bash -c 'set -a; [ -f "$HOME/.claude/.env" ] && . "$HOME/.claude/.env"; set +a; exec claude'
+}
+alias cc='dtach_claude'
+
+# Rappeler a la demande le menu de reprise.
+alias d='source ~/.local/bin/dtach-router'
+
+# Au demarrage d'un shell interactif, proposer de reprendre une session dtach existante
+# (silencieux si aucune). Place ici plutot que dans ~/.profile car les terminaux VS Code
+# Remote-SSH sont non-login et ne lisent pas ~/.profile ; ~/.bashrc, lui, est toujours lu.
+case $- in *i*) [ -x "$HOME/.local/bin/dtach-router" ] && . "$HOME/.local/bin/dtach-router" ;; esac
diff --git a/bin/dt b/bin/dt
index bcc30ee..4bb3948 100755
--- a/bin/dt
+++ b/bin/dt
@@ -28,12 +28,22 @@ _pids_for_socket() {
   pgrep -f -- "dtach -[cnAN] $sock" 2>/dev/null | sort -u
 }
 
-_cwd_of() { readlink -f "/proc/$1/cwd" 2>/dev/null; }
+# Dossier courant du process : /proc sur Linux, lsof sur macOS (pas de /proc).
+_cwd_of() {
+  if [ -d /proc ]; then
+    readlink -f "/proc/$1/cwd" 2>/dev/null
+  else
+    lsof -a -p "$1" -d cwd -Fn 2>/dev/null | sed -n 's/^n//p'
+  fi
+}
 
 # Heure de demarrage REELLE du process (fiable, immuable), en epoch.
+# date -d = GNU (Linux), date -j -f = BSD (macOS). Locale C : format lstart stable.
 _starttime_of() {
-  local ls; ls=$(ps -o lstart= -p "$1" 2>/dev/null) || return
-  [ -n "$ls" ] && date -d "$ls" +%s 2>/dev/null
+  local ls; ls=$(LC_ALL=C ps -o lstart= -p "$1" 2>/dev/null) || return
+  [ -n "$ls" ] || return
+  LC_ALL=C date -d "$ls" +%s 2>/dev/null \
+    || LC_ALL=C date -j -f '%a %b %e %T %Y' "$ls" +%s 2>/dev/null
 }
 
 _age() {
@@ -52,6 +62,8 @@ _age() {
 emit_raw() {
   shopt -s nullglob
   local sock name pids master cwd start
+  # Tilde via variable : "\~" en remplacement reste "\~" sous bash 3.2 (macOS).
+  local tilde='~'
   for sock in "$DTDIR"/*; do
     [ -S "$sock" ] || continue
     name=$(basename "$sock")
@@ -61,7 +73,7 @@ emit_raw() {
     cwd=$(_cwd_of "$master");        cwd="${cwd:-?}"
     start=$(_starttime_of "$master"); start="${start:-$now}"
     # colonnes : NOM(cache pour fzf) TAB DOSSIER TAB AGE
-    printf '%s\t%s\t%s\n' "$name" "${cwd/#$HOME/\~}" "$(_age "$start")"
+    printf '%s\t%s\t%s\n' "$name" "${cwd/#$HOME/$tilde}" "$(_age "$start")"
   done
 }
 
@@ -99,6 +111,6 @@ case "${1:-}" in
   kill)  shift; cmd_kill "$@" ;;
   sock)  shift; cmd_sock "$@" ;;
   --raw) emit_raw ;;
-  ""|-h|--help) sed -n '2,18p' "$0" | sed 's/^# \?//' ;;
-  *) echo "Commande inconnue: $1"; sed -n '2,18p' "$0" | sed 's/^# \?//'; exit 1 ;;
+  ""|-h|--help) sed -n '2,18p' "$0" | sed -E 's/^# ?//' ;;
+  *) echo "Commande inconnue: $1"; sed -n '2,18p' "$0" | sed -E 's/^# ?//'; exit 1 ;;
 esac
diff --git a/install.sh b/install.sh
index 79aa6c2..b1e486c 100755
--- a/install.sh
+++ b/install.sh
@@ -273,7 +273,192 @@ offer_ssh_memory_guard() {
 	fi
 }
 
-# System packages: Debian/Ubuntu only. Skipped where apt-get is absent (e.g. macOS).
+# Put brew on this script's PATH (Apple Silicon: /opt/homebrew, Intel: /usr/local).
+# Returns 1 when Homebrew is not installed.
+load_brew_env() {
+	local brew_bin
+	for brew_bin in /opt/homebrew/bin/brew /usr/local/bin/brew; do
+		if [ -x "$brew_bin" ]; then
+			eval "$("$brew_bin" shellenv)"
+			return 0
+		fi
+	done
+	return 1
+}
+
+# Homebrew is the macOS stand-in for apt-get. Installed with its official script
+# (asks for the sudo password, pulls the Xcode Command Line Tools: clang, make, git).
+# Idempotent: a no-op when brew is already there.
+ensure_homebrew() {
+	load_brew_env && return 0
+	echo "Installing Homebrew"
+	/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+	load_brew_env
+}
+
+# The apt-get package list, mapped to Homebrew formulae. Linux-only packages are
+# left out and listed by print_macos_gaps. php ships gd, mbstring, xml, intl, curl
+# and mysql built in; bash is the bash 5 the bashrc needs (macOS ships 3.2).
+install_brew_packages() {
+	brew update
+	brew upgrade
+	brew install \
+		vim git git-lfs git-filter-repo gitleaks pkgconf shellcheck gh \
+		curl gnupg lftp inetutils \
+		unzip tree tmux fzf dtach \
+		node python pipx php \
+		mariadb imagemagick \
+		ffmpeg weasyprint poppler qpdf webp libavif \
+		bash
+}
+
+# Start a Homebrew service at login, like systemctl enable --now. Skipped when
+# already started, so a re-run never restarts a running database or VM.
+start_brew_service() {
+	local status
+	status="$(brew services list | awk -v name="$1" '$1 == name { print $2 }')"
+	if [ "$status" = "started" ]; then
+		echo "$1 service already started — skipping"
+		return 0
+	fi
+	brew services start "$1"
+}
+
+# Docker on macOS: the docker CLI talks to a Linux VM run by colima (free, no GUI,
+# no Docker Desktop licence). compose and buildx are CLI plugins that brew installs
+# outside Docker's search path, hence cliPluginsExtraDirs. An existing
+# ~/.docker/config.json is never rewritten: a hint is printed instead.
+install_colima_docker() {
+	local config="$HOME/.docker/config.json"
+	local plugins
+	plugins="$(brew --prefix)/lib/docker/cli-plugins"
+	brew install colima docker docker-compose docker-buildx
+	if [ ! -f "$config" ]; then
+		mkdir -p "$HOME/.docker"
+		printf '{\n  "cliPluginsExtraDirs": ["%s"]\n}\n' "$plugins" > "$config"
+	elif ! grep -qF "$plugins" "$config"; then
+		echo "Add \"cliPluginsExtraDirs\": [\"$plugins\"] to $config for 'docker compose'" >&2
+	fi
+	start_brew_service colima
+}
+
+# macOS login shell: bash (brew's bash 5 + bashrc-osx) or zsh (oh-my-zsh +
+# zshrc-osx). MACOS_SHELL=bash|zsh answers in advance; with no terminal attached
+# and no answer, bash. Prints the choice on stdout (the question goes to stderr).
+choose_macos_shell() {
+	local answer="${MACOS_SHELL:-}"
+	if [ -z "$answer" ] && [ -t 0 ]; then
+		read -rp "Login shell on macOS: bash or zsh (oh-my-zsh)? [bash] " answer || true
+	fi
+	case "$answer" in
+		zsh) echo zsh ;;
+		bash|"") echo bash ;;
+		*) echo "Unknown shell '$answer' — using bash" >&2; echo bash ;;
+	esac
+}
+
+# Make $1 the login shell. /etc/shells must list it before chsh accepts it.
+# chsh asks for the account password; a failure only prints a hint. Idempotent.
+set_login_shell() {
+	local target="$1" current
+	if ! grep -qxF "$target" /etc/shells; then
+		echo "$target" | sudo tee -a /etc/shells >/dev/null
+	fi
+	current="$(dscl . -read "/Users/$USER" UserShell | awk '{ print $2 }')"
+	if [ "$current" = "$target" ]; then
+		echo "Login shell already $target — skipping"
+		return 0
+	fi
+	chsh -s "$target" || echo "chsh failed — run: chsh -s $target" >&2
+}
+
+# oh-my-zsh with its official script, unattended: no chsh (set_login_shell does
+# it), no zsh launched mid-install, ~/.zshrc left alone (deploy_zsh_config owns
+# it). Idempotent: skipped when ~/.oh-my-zsh exists.
+install_oh_my_zsh() {
+	if [ -d "$HOME/.oh-my-zsh" ]; then
+		echo "oh-my-zsh already installed — skipping"
+		return 0
+	fi
+	echo "Installing oh-my-zsh"
+	KEEP_ZSHRC=yes sh -c \
+		"$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" \
+		"" --unattended
+}
+
+# Deploy zshrc-osx to ~/.zshrc and the bchanot prompt theme into oh-my-zsh's
+# custom themes. A ~/.zshrc that differs from the repo's is kept as
+# ~/.zshrc.backup-<date>, not in ~/Oldconfig: that dir is wiped on every run, so
+# a second run would destroy the original (and its nvm/bun lines).
+deploy_zsh_config() {
+	local themes="$HOME/.oh-my-zsh/custom/themes"
+	local backup
+	backup="$HOME/.zshrc.backup-$(date +%Y%m%d-%H%M%S)"
+	if [ -e "$HOME/.zshrc" ] && ! cmp -s "$HOME/.zshrc" "$SCRIPT_DIR/zsh/zshrc-osx"; then
+		echo "Saving the current ~/.zshrc to $backup"
+		mv "$HOME/.zshrc" "$backup"
+	fi
+	echo "Deploying zsh/zshrc-osx + bchanot theme"
+	cp "$SCRIPT_DIR/zsh/zshrc-osx" "$HOME/.zshrc"
+	mkdir -p "$themes"
+	cp "$SCRIPT_DIR/zsh/bchanot.zsh-theme" "$themes/"
+}
+
+# The chosen macOS shell: zsh gets oh-my-zsh + its config; bash needs brew's
+# bash 5 (macOS ships 3.2, too old for the bashrc). Either way it becomes the
+# login shell, so new terminals load the matching config.
+setup_macos_shell() {
+	if [ "$1" = zsh ]; then
+		install_oh_my_zsh
+		deploy_zsh_config
+		set_login_shell /bin/zsh
+	else
+		set_login_shell "$(brew --prefix)/bin/bash"
+	fi
+}
+
+# macOS terminals open LOGIN shells, which read ~/.bash_profile and never ~/.bashrc.
+# Appends one line sourcing ~/.bashrc. Idempotent: skipped when already present.
+wire_bash_profile() {
+	local profile="$HOME/.bash_profile"
+	# shellcheck disable=SC2016  # $HOME must expand when the profile runs, not now.
+	local line='[ -f "$HOME/.bashrc" ] && . "$HOME/.bashrc"'
+	grep -qxF "$line" "$profile" 2>/dev/null && return 0
+	echo "Wiring ~/.bash_profile to source ~/.bashrc"
+	printf '\n# Load the interactive bash config (deployed by install.sh).\n%s\n' \
+		"$line" >> "$profile"
+}
+
+# What the Linux install sets up that this macOS run did not, and why.
+print_macos_gaps() {
+	cat <<'EOF'
+
+Not installed on macOS (compared with the Linux install):
+  - gcc, make          Apple clang + make come with the Xcode Command Line Tools
+                       (`gcc` runs clang). Real GCC: brew install gcc (gcc-15).
+  - valgrind           not supported on macOS arm64. Use `leaks` or -fsanitize=address.
+  - dkms               Linux kernel modules, no macOS equivalent.
+  - net-tools          ifconfig / netstat / route are built into macOS.
+  - openssh-server     built in, off by default: System Settings > General >
+                       Sharing > Remote Login.
+  - cifs-utils         SMB mounts are built in: mount_smbfs, or Finder Cmd-K.
+  - ca-certificates, apt-transport-https   apt plumbing, not needed.
+  - php-imagick        not bundled with brew php: pecl install imagick.
+  - ubuntu-desktop-minimal + RDP (gnome-remote-desktop)   use Screen Sharing:
+                       System Settings > General > Sharing > Screen Sharing.
+  - NVIDIA driver      no NVIDIA GPU support on macOS.
+  - disk-usage login warning (/etc/profile.d)   Linux-only (GNU df).
+  - cloudpex NAS mount helper   Linux-only (cifs-utils).
+  - fail2ban, unattended-upgrades, sshd hardening drop-in   Linux security baseline.
+                       macOS: enable automatic updates in System Settings >
+                       General > Software Update.
+  - /tmp on disk + SSH memory guard offers   systemd-only.
+Replaced: Docker engine -> colima VM + docker CLI; code-server and mariadb run
+as brew services instead of systemd units.
+EOF
+}
+
+# System packages: apt-get on Debian/Ubuntu, Homebrew on macOS.
 if command -v apt-get >/dev/null 2>&1; then
 	sudo apt-get update
 	sudo apt-get upgrade -y
@@ -320,8 +505,21 @@ if command -v apt-get >/dev/null 2>&1; then
 	install_fail2ban
 	install_unattended_upgrades
 	harden_sshd
+elif [ "$(uname -s)" = "Darwin" ]; then
+	# Asked first, so the long brew steps below can run unattended.
+	macos_shell="$(choose_macos_shell)"
+	echo "macOS login shell: $macos_shell"
+
+	ensure_homebrew
+	install_brew_packages
+
+	# Docker (colima VM), then code-server and MariaDB as login services.
+	install_colima_docker
+	brew install code-server
+	start_brew_service code-server
+	start_brew_service mariadb
 else
-	echo "apt-get not found — skipping system packages (install vim/git manually)."
+	echo "Neither apt-get nor macOS — skipping system packages (install vim/git manually)."
 fi
 
 # Back up any existing config before overwriting (re-runnable).
@@ -347,7 +545,7 @@ git clone --quiet https://github.com/preservim/nerdtree "$HOME/.vim/bundle/nerdt
 
 # Deploy tracked vim files: vimrc, pathogen loader, molokai colorscheme.
 echo "Deploying vim config"
-cp -rupv "$SCRIPT_DIR"/vim/* "$HOME/.vim/"
+cp -Rpv "$SCRIPT_DIR"/vim/* "$HOME/.vim/"
 ln -sf "$HOME/.vim/vimrc" "$HOME/.vimrc"
 
 # Deploy the bashrc matching the detected OS.
@@ -385,6 +583,20 @@ if command -v apt-get >/dev/null 2>&1; then
 	offer_ssh_memory_guard
 fi
 
-echo "Done. Restart your shell or run: source ~/.bashrc"
-echo "If you use zsh, switch to bash to enjoy these settings =)"
-echo "Note: the deployed bashrc puts ~/.local/bin on PATH — re-login or run: source ~/.bashrc"
+# macOS: login shells skip ~/.bashrc unless ~/.bash_profile sources it (kept even
+# with zsh, so `bash` stays usable); set up the chosen shell, then report what the
+# Linux install has that this one does not.
+if [ "$(uname -s)" = "Darwin" ]; then
+	wire_bash_profile
+	setup_macos_shell "${macos_shell:-bash}"
+	print_macos_gaps
+fi
+
+if [ "${macos_shell:-bash}" = zsh ]; then
+	echo "Done. Open a new terminal or run: exec zsh"
+	echo "Machine-specific zsh lines (nvm, bun...) go in ~/.zshrc.local"
+else
+	echo "Done. Restart your shell or run: source ~/.bashrc"
+	echo "If you use zsh, switch to bash to enjoy these settings =)"
+	echo "Note: the deployed bashrc puts ~/.local/bin on PATH — re-login or run: source ~/.bashrc"
+fi
diff --git a/zsh/bchanot.zsh-theme b/zsh/bchanot.zsh-theme
new file mode 100644
index 0000000..d3d9bd3
--- /dev/null
+++ b/zsh/bchanot.zsh-theme
@@ -0,0 +1,57 @@
+# bchanot.zsh-theme — oh-my-zsh port of the bashrc prompt:
+#   ✔ (12ms) user [ ~/dir ] [branch -*+] >
+# Mark + timer cyan (red ✘ on failure), user and brackets green (red for root),
+# git segment blue. Deployed to ~/.oh-my-zsh/custom/themes by install.sh.
+
+zmodload zsh/datetime
+autoload -Uz add-zsh-hook
+
+# Git segment, same rules as parse_git_branch/parse_git_dirty in the bashrc:
+# " [branch bits]" with + (new, modified, renamed or untracked files),
+# * (ahead of upstream) and - (deleted files). Empty outside a repo.
+bchanot_git_info() {
+	local lines branch bits=''
+	lines="$(git status --porcelain --branch 2>/dev/null)" || return 0
+	branch="$(git symbolic-ref --short HEAD 2>/dev/null)" || branch='(detached)'
+	if print -r -- "$lines" | grep -qE '^(\?\?|[MAR].|.M)'; then
+		bits='+'
+	fi
+	if print -r -- "${lines%%$'\n'*}" | grep -q '\[ahead '; then
+		bits="*$bits"
+	fi
+	if print -r -- "$lines" | grep -qE '^(D.|.D)'; then
+		bits="-$bits"
+	fi
+	print -r -- " [${branch}${bits:+ $bits}]"
+}
+
+# Command timer: preexec stamps the start, precmd formats the elapsed time with
+# the bashrc's rules (about 3 significant digits, us up to h).
+bchanot_timer_start() {
+	_bchanot_cmd_start=$EPOCHREALTIME
+}
+
+bchanot_timer_stop() {
+	integer delta_us us ms s m h
+	(( delta_us = (EPOCHREALTIME - ${_bchanot_cmd_start:-$EPOCHREALTIME}) * 1000000 ))
+	(( us = delta_us % 1000, ms = (delta_us / 1000) % 1000 ))
+	(( s = (delta_us / 1000000) % 60, m = (delta_us / 60000000) % 60 ))
+	(( h = delta_us / 3600000000 ))
+	if ((h > 0)); then _bchanot_timer_show=${h}h${m}m
+	elif ((m > 0)); then _bchanot_timer_show=${m}m${s}s
+	elif ((s >= 10)); then _bchanot_timer_show=${s}.$((ms / 100))s
+	elif ((s > 0)); then _bchanot_timer_show=${s}.$(printf %03d $ms)s
+	elif ((ms >= 100)); then _bchanot_timer_show=${ms}ms
+	elif ((ms > 0)); then _bchanot_timer_show=${ms}.$((us / 100))ms
+	else _bchanot_timer_show=${us}us
+	fi
+	unset _bchanot_cmd_start
+}
+
+add-zsh-hook preexec bchanot_timer_start
+add-zsh-hook precmd bchanot_timer_stop
+
+PROMPT='%B%(?.%F{cyan}✔.%F{red}✘) (${_bchanot_timer_show}) '
+PROMPT+='%(!.%F{red}.%F{green})%n [%f%b %~ %B%(!.%F{red}.%F{green})]'
+PROMPT+='%F{blue}$(bchanot_git_info) %f%b> '
+RPROMPT=''
diff --git a/zsh/zshrc-osx b/zsh/zshrc-osx
new file mode 100644
index 0000000..10d2cc9
--- /dev/null
+++ b/zsh/zshrc-osx
@@ -0,0 +1,67 @@
+# zshrc for macOS: zsh + oh-my-zsh counterpart of bash/bashrc-osx (same env,
+# aliases and dtach menu; the prompt lives in bchanot.zsh-theme).
+# Machine-specific lines (nvm, bun, tokens...) go in ~/.zshrc.local, never here.
+
+# Homebrew on PATH (Apple Silicon: /opt/homebrew, Intel: /usr/local).
+for brew_bin in /opt/homebrew/bin/brew /usr/local/bin/brew; do
+	if [ -x "$brew_bin" ]; then
+		eval "$("$brew_bin" shellenv)"
+		break
+	fi
+done
+unset brew_bin
+
+## oh-my-zsh (loaded first: the aliases below override its defaults, e.g. `d`)
+export ZSH="$HOME/.oh-my-zsh"
+ZSH_THEME="bchanot"
+plugins=(git)
+source "$ZSH/oh-my-zsh.sh"
+
+## Enable color support of ls and also add handy aliases
+# Some colors (BSD ls: -G instead of GNU --color)
+alias ls='ls -G'
+alias grep='grep --color=auto'
+
+## Some export
+# colored GCC warnings and errors
+export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'
+
+# Ensure ~/.local/bin is on PATH (pipx CLIs + personal scripts from bin/)
+case ":$PATH:" in
+	*":$HOME/.local/bin:"*) ;;
+	*) export PATH="$HOME/.local/bin:$PATH" ;;
+esac
+
+# History: none for root, near-unlimited otherwise (zsh has no -1 = unlimited).
+if [[ $EUID == 0 ]] ; then
+	HISTSIZE=0
+	SAVEHIST=0
+else
+	HISTSIZE=10000000
+	SAVEHIST=10000000
+fi
+
+# Used for vim header
+export VIUSER=bchanot
+export VIMAIL=bchanot@gmail.fr
+
+# claude-dans-dtach : creer une session (claude tournant dans dtach, detache via Ctrl-\).
+# Usage : cd ~/projets/seo && cc seo   -> session nommee "seo".
+# Pas de systemd sur macOS : dtach est lance directement (pas de slice cgroup).
+dtach_claude() {
+  local name="${1:-claude-$(date +%H%M%S)}"
+  mkdir -p "$HOME/.dtach"
+  dtach -c "$HOME/.dtach/${name}" -e '^\' \
+      bash -c 'set -a; [ -f "$HOME/.claude/.env" ] && . "$HOME/.claude/.env"; set +a; exec claude'
+}
+alias cc='dtach_claude'
+
+# Rappeler a la demande le menu de reprise.
+alias d='source ~/.local/bin/dtach-router'
+
+# Reglages propres a cette machine (non versionnes).
+[ -f "$HOME/.zshrc.local" ] && source "$HOME/.zshrc.local"
+
+# Au demarrage d'un shell interactif, proposer de reprendre une session dtach existante
+# (silencieux si aucune).
+case $- in *i*) [ -x "$HOME/.local/bin/dtach-router" ] && . "$HOME/.local/bin/dtach-router" ;; esac