Better alternatives to Activity Monitor on Mac

Activity Monitor ships with every Mac, and for the kind of “what on earth is using my CPU right now” question it answers well. The catch is that it’s a window — you have to launch it, find it, and switch back to whatever you were actually doing. For ambient awareness, or for anything beyond CPU and memory, you quickly want something else.

Here’s the lay of the land.

What people actually replace Activity Monitor with

Command-line tools

If you live in a terminal, you might never install a GUI monitor. top -o cpu gives you a live process list. htop (via Homebrew) is friendlier, with colour and tree view. nettop -P shows per-process network use. iostat 1 shows disk throughput each second. powermetrics —samplers cpu_power,gpu_power is the Apple Silicon power deep-dive.

The downside is obvious — you’re tied to a terminal window, and nothing is glanceable.

Menu bar monitors

This is the category most people end up in. The menu bar is the one piece of UI that’s always visible, so it’s the right home for “is anything weird happening” data.

Long-running options in this space:

• iStat Menus — the maximalist option. Subscription pricing, every sensor you can imagine, deep customisation, can feel heavy.
• MenuMeters — free, open source, lightweight. Hasn’t kept perfect pace with newer macOS releases but still works.
• Stats — free and open source, very capable, a fair number of toggles to wade through.
• Beacon — a paid one-time-purchase option focused on being fast, simple, and Apple Silicon-native.

Beacon as the lightweight alternative

The pitch is small and specific: put CPU, memory, network, disk, GPU, temperature and battery in the menu bar with one click of setup, and stay out of your way.

1. Install Beacon and grant the permissions it requests.
2. Open Settings > Menu Bar and tick the readouts you want.
3. Click any readout for a detail panel with top processes and a short history graph.

A one-time purchase, no subscription, and CPU use under 1% on M-series Macs in my testing.

Which to pick

Honestly:

• If you want the absolute most data and don’t mind a subscription, iStat Menus is still the most feature-dense.
• If you want free and don’t mind some rough edges, Stats is excellent.
• If you want something quiet, fast, native-looking, and paid-once, Beacon is built for that.
• If you live in Terminal, your existing tools are fine — but a tiny menu-bar readout still helps catch things you weren’t looking for.

The point isn’t which app — it’s getting off the “launch Activity Monitor every time” workflow. Once system stats are ambient, you notice problems sooner and you trust the machine more.