Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents
https://cmux.com
| .claude/commands | ||
| .github/workflows | ||
| Assets.xcassets | ||
| CLI | ||
| docs | ||
| docs-site | ||
| ghostty@4713b7e236 | ||
| GhosttyTabs.xcodeproj | ||
| GhosttyTabsUITests | ||
| homebrew-cmux@19af91f6d4 | ||
| node_modules | ||
| Resources | ||
| scripts | ||
| Sources | ||
| tests | ||
| web | ||
| .gitignore | ||
| .gitmodules | ||
| .vercelignore | ||
| AGENTS.md | ||
| bun.lock | ||
| CHANGELOG.md | ||
| CLAUDE.md | ||
| cmux-Bridging-Header.h | ||
| CONTRIBUTING.md | ||
| ghostty.h | ||
| package.json | ||
| Package.resolved | ||
| Package.swift | ||
| README.md | ||
| TODO.md | ||
cmux
A Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents
Features
- Native macOS app — Built with Swift and AppKit, not Electron. Fast startup, low memory.
- Vertical tabs — See all your terminals at a glance in a sidebar
- Notification panel — See which agents are waiting for input at a glance
- Notification rings — Tabs flash when AI agents (Claude Code, Codex) need your attention
- Lightweight — Small binary, minimal resource footprint. No bundled browser engine.
- GPU-accelerated — Powered by libghostty for smooth rendering
Install
DMG (recommended)
Open the .dmg and drag cmux to your Applications folder. cmux auto-updates via Sparkle, so you only need to download once.
Homebrew
brew tap manaflow-ai/cmux
brew install --cask cmux
To update later:
brew upgrade --cask cmux
On first launch, macOS may ask you to confirm opening an app from an identified developer. Click Open to proceed.
Why cmux?
Running multiple AI coding agents? cmux helps you manage them. Instead of losing track of which terminal needs input, the notification panel shows you exactly where to look.
A native macOS app means it launches instantly, uses minimal RAM, and feels right at home on your Mac.
Keyboard Shortcuts
Workspaces
| Shortcut | Action |
|---|---|
| ⌘ N | New workspace |
| ⌘ 1–8 | Jump to workspace 1–8 |
| ⌘ 9 | Jump to last workspace |
| ⌘ ⇧ W | Close workspace |
Surfaces
| Shortcut | Action |
|---|---|
| ⌘ T | New surface |
| ⌘ ⇧ [ | Previous surface |
| ⌃ ⇧ Tab | Previous surface |
| ⌃ 1–8 | Jump to surface 1–8 |
| ⌃ 9 | Jump to last surface |
| ⌘ W | Close surface |
Split Panes
| Shortcut | Action |
|---|---|
| ⌘ D | Split right |
| ⌘ ⇧ D | Split down |
| ⌥ ⌘ ← → ↑ ↓ | Focus pane directionally |
Browser
| Shortcut | Action |
|---|---|
| ⌘ ⇧ B | Open browser in split |
| ⌘ L | Focus address bar |
| ⌘ ] | Forward |
| ⌘ R | Reload page |
| ⌥ ⌘ I | Open Developer Tools |
Notifications
| Shortcut | Action |
|---|---|
| ⌘ ⇧ I | Show notifications panel |
| ⌘ ⇧ U | Jump to latest unread |
Find
| Shortcut | Action |
|---|---|
| ⌘ F | Find |
| ⌘ G / ⌘ ⇧ G | Find next / previous |
| ⌘ ⇧ F | Hide find bar |
| ⌘ E | Use selection for find |
Terminal
| Shortcut | Action |
|---|---|
| ⌘ K | Clear scrollback |
| ⌘ C | Copy (with selection) |
| ⌘ V | Paste |
| ⌘ + / ⌘ - | Increase / decrease font size |
| ⌘ 0 | Reset font size |
Window
| Shortcut | Action |
|---|---|
| ⌘ ⇧ N | New window |
| ⌘ , | Settings |
| ⌘ ⇧ R | Reload configuration |
| ⌘ Q | Quit |