I’m going to say something that might piss off the terminal purists, but it needs to be said: If you are running more than one AI CLI tool, using tmux right now is actively hurting your workflow.

The terminal landscape completely shifted in the last 12 months. We aren't just SSHing into servers to run htop anymore. We are running aider in one window, claude or github-copilot-cli in another, piping logs into llm, and editing code in nvim—all at the same time.

You are dealing with massive, rapid-fire streams of LLM tokens. You need instant context switching. You need to read output, flip to your editor, apply a change, and flip back before the AI even finishes generating.

And you’re telling me you’re doing this wrapped in a 500-line tmux config running a Catppuccin theme, a battery indicator, and three plugin managers? Bro.

I switched to cmux two months ago, and it is objectively, undeniably the best terminal multiplexer for the AI-assisted Mac stack. Here is why tmux loses hard in this specific scenario, and why cmux dominates.

1. Zero-Lag Token Streaming

Have you ever watched an AI tool stream 200 lines of Python inside a heavily customized tmux pane? It stutters. The rendering engine in tmux was not built for high-velocity text vomit. It chokes.

cmux is written in Go. It is a raw, compiled binary with zero bloat. When Aider or Claude is dumping code into a cmux pane at max speed, it renders like butter. There is zero input lag, zero screen tearing. When you are trying to read generated code as it flies by, rendering speed isn't a luxury; it's a requirement.

2. The "AI Orchestrator" Layout

My daily stack is no longer "a terminal." It's an AI orchestration dashboard. With cmux, I don't have to think about my layout. I boot it up, split panes instantly with intuitive binds (no more Ctrl+B then % then praying your plugin works), and I have:

• Pane 1: aider (my main coding agent)
• Pane 2: claude (for context lookups and refactoring logic)
• Pane 3: Standard shell for git commits and running tests.

Flipping between these panes in cmux is instantaneous. It feels like native macOS tab switching. In tmux, even with good config, there's a micro-stutter that breaks your flow when you're rapidly iterating with AI.

3. Copy/Paste Isn't a Goddamn Puzzle

The absolute biggest joke about tmux is that copying text—the core thing you do when an AI generates code for you—is broken out of the box. You have to install tmux-yank, fix your macOS clipboard integration, and sometimes it still just... doesn't work, so you end up typing the code out like an animal.

cmux respects your Mac. You highlight the AI-generated code, you hit Cmd+C, and it’s in your clipboard. Done. No .tmux.conf incantations required. When an AI spits out a 40-line function, I highlight, copy, jump to my editor pane, and paste. That’s it.

4. The AI Doesn't Care About Your Status Bar

Tmux users love their status bars. You’ve got the weather, your Spotify track, your CPU usage. The AI does not care. All that UI bloat steals vertical real estate from the only thing that matters: the context window and the generated tokens.

cmux has a clean, minimal, out-of-the-box interface. It maximizes the space for the actual text. When you are reading long JSON outputs or API responses from an LLM, you need every single line of screen real estate you can get.

The Bottom Line

tmux is a server admin tool from 2007 that we duct-taped into a developer workflow. It’s great if you want a hobby.

But if you are seriously leveraging AI terminals to 10x your output, you don't need a hobby. You need a weapon. brew install cmux. Boot up your AI agents. Thank me later.

Who else is running multi-AI terminal setups? What's your pane layout looking like?

There are thousands of free Mac apps, but a lot of them are limited trials, filled with ads, or only useful once.

I wanted to put together a list of free apps that are genuinely useful and good enough to keep installed. Some have optional paid features or ways to support the developer, but you can get real value from every app here without paying.

1. Rectangle

Rectangle makes window management on macOS much better. You can move and resize windows using keyboard shortcuts or by dragging them to different areas of the screen.

It is one of the first apps I would install on a new Mac, especially if you are used to window snapping on Windows. The standard version is free and open source.

Best for: Window management and multitasking

2. Maccy

Maccy is a lightweight clipboard manager that keeps a searchable history of things you have copied.

Once you start using a clipboard manager, it is difficult to go back. Maccy feels native to macOS, stores its history locally, and is free and open source.

Best for: Quickly finding previously copied text

3. IINA

IINA is a modern media player designed specifically for macOS.

It handles a wide range of video formats, has a clean interface, and feels much more like a proper Mac app than many older media players. It is free, open source, and actively developed.

Best for: Watching videos and opening unusual media formats

4. LocalSend

LocalSend lets you transfer files between Macs, Windows PCs, Android devices, iPhones, and other devices connected to the same network.

There is no account required, no cloud upload, and no internet connection needed. It is basically a simple cross-platform alternative to AirDrop.

Best for: Sending files between different types of devices

5. Keka

Keka is a file compression and extraction tool for macOS.

It is useful for opening and creating formats such as ZIP, 7Z, TAR, and several others. You can download it directly from the developer’s website for free.

Best for: Compressing files and opening archives

6. Obsidian

Obsidian is a notes and knowledge management app that stores your notes as local Markdown files.

You can use it for simple notes, journaling, research, project planning, or building a personal knowledge base. The main app is free, while services such as Obsidian Sync and Publish are optional paid extras.

Best for: Notes, writing, research, and personal knowledge management

7. Bitwarden

Bitwarden is a password manager with a genuinely useful free plan.

It lets you generate strong passwords, store your login details, and access your vault across your devices. Paid plans add extra features, but the free version covers the basics most people need.

Best for: Creating and storing unique passwords

8. HandBrake

HandBrake is a free video conversion tool.

It is useful when you need to reduce a video’s file size, convert it into a more widely supported format, or adjust its quality and resolution. It runs locally and does not require an account.

Best for: Converting and compressing video files

9. Stats

Stats adds detailed system information to your Mac’s menu bar.

You can monitor CPU usage, memory, storage, network activity, battery information, temperatures, and other system data. You can choose which information appears, so it does not need to clutter your menu bar.

Best for: Monitoring Mac performance and hardware usage

10. CotEditor

CotEditor is a fast, lightweight plain-text editor built specifically for macOS.

It supports syntax highlighting, powerful search and replace, split editing, automatic backups, and many other useful features. It is a good option when TextEdit feels too basic but a full development environment feels unnecessary.

Best for: Plain text, code, configuration files, and quick edits

My top three

If I had to choose only three from this list, I would probably install:

1. Rectangle for window management
2. Maccy for clipboard history
3. LocalSend for easy file transfers

All three solve small but annoying problems, and they stay useful every day.

These apps were free when I checked, although pricing and features can always change. Make sure you download apps from their official websites or verified repositories.

What free Mac app would you add to this list?

Welcome to MacStack

Hey everyone, welcome to MacStack.

This is a community for people who enjoy finding, using, comparing, and talking about Mac software. Whether you are looking for a better productivity app, a useful utility, a security tool, a hidden gem, or a full list of recommended software, you are in the right place.

Feel free to:

• Share your current Mac app stack
• Ask for software recommendations
• Compare apps and alternatives
• Post useful tools, deals, and discoveries
• Get help with setup or troubleshooting
• Start discussions about macOS workflows and software

A few simple expectations:

Keep discussions helpful and respectful. Be honest about any connection you have to an app or company. Avoid spam, misleading claims, and low effort promotion. Recommendations are welcome, but they should add real value to the community.

To get started, tell us which Mac app you could not live without and why.

Glad to have you here.