Document macOS install (brew, Ollama, AirPlay port, launchd)

README + setup.py cover the Homebrew / Apple Silicon path: brew install
python@3.11 tmux ollama, Metal serving via Ollama/llama.cpp, the launchd
service, and the macOS AirPlay Receiver conflict on ports 7000/5000.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -82,8 +82,8 @@ The Cookbook model catalog check should print a non-zero count. If it prints
 `0`, rebuild the Odysseus image with `docker compose build --no-cache odysseus`.
 
 ### Option 2: Manual install — Linux / macOS
-**Requirements:** Python 3.11+. On Linux/Termux, Cookbook also requires `tmux`
-for background model downloads and serves.
+**Requirements:** Python 3.11+. Cookbook also requires `tmux` for background
+model downloads and serves.
 
 Install system packages first:
 ```bash
@@ -95,19 +95,49 @@ sudo pacman -S tmux
 
 # Fedora
 sudo dnf install tmux
+
+# macOS (Homebrew). The system Python is 3.9 — install 3.11+ too:
+brew install python@3.11 tmux
 ```
 
 Then install Odysseus:
 ```bash
 git clone <your-odysseus-repo-url>
 cd odysseus
-python3 -m venv venv
+python3 -m venv venv          # on macOS use: python3.11 -m venv venv
 source venv/bin/activate
 pip install -r requirements.txt
 python setup.py            # creates data dirs and prints an initial admin password
 uvicorn app:app --host 0.0.0.0 --port 7000
 ```
 
+#### Apple Silicon (M-series) notes
+Odysseus detects the Metal GPU and your unified memory automatically — the
+Cookbook's hardware scan reports `backend: metal` and recommends GGUF/MLX models
+that fit, and filters out CUDA-only formats (AWQ/GPTQ/FP8) it can't serve. For
+local serving, **Ollama** is the simplest Metal-accelerated engine:
+```bash
+brew install ollama
+```
+llama.cpp also works (`brew install llama.cpp` ships a prebuilt `llama-server`,
+or Cookbook will build it from source with Metal on first serve). vLLM is
+CUDA/ROCm-only and does **not** run on macOS.
+
+**Port 7000 conflicts with AirPlay Receiver.** macOS runs an AirPlay Receiver on
+ports 7000 and 5000 by default, so `uvicorn … --port 7000` fails to bind. Either
+turn it off (System Settings → General → AirDrop & Handoff → **AirPlay Receiver:
+Off**) or run Odysseus on another port:
+```bash
+uvicorn app:app --host 127.0.0.1 --port 7860
+```
+
+To run Odysseus as a background service that starts at login (the macOS
+equivalent of the systemd unit), use the bundled launchd installer:
+```bash
+./install-service-macos.sh                       # http://127.0.0.1:7000
+ODYSSEUS_PORT=7860 ./install-service-macos.sh    # if 7000 is taken by AirPlay
+```
+
 ### Option 3: Manual install — Windows (PowerShell)
 ```powershell
 git clone <your-odysseus-repo-url>

setup.py

@@ -109,6 +109,9 @@ def check_deps():
         print("\n  [warn] tmux not found")
         print("         Cookbook uses tmux for background downloads and model serves.")
         print("         Install it with your OS package manager, for example:")
+        if sys.platform == "darwin":
+            print("           brew install tmux")
+        else:
             print("           sudo apt install tmux")
             print("           sudo pacman -S tmux")
             print("           sudo dnf install tmux")