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Performance Monitor for Mac

Real-time CPU, memory, network, disk, GPU, battery, and Bluetooth metrics in a clean popover interface.

By inequitas. Free and open source, MIT licence.

Get it with OpenDMG View source on GitHub

Performance Monitor at a glance

Version
1.3.1
Released
2 October 2026
Download size
1.8 MB
Works on
Apple silicon and Intel
Licence
MIT
Category
Menu Bar and Notch
Developer
inequitas
GitHub stars
11

About Performance Monitor

Lightweight, open-source macOS menu bar system monitor — CPU, memory, network, disk, GPU, temperatures, battery. No telemetry, Apple Silicon native.

Screenshots

Performance Monitor screenshot 1

How to install Performance Monitor on a Mac

  1. Get OpenDMG. It is a free app store for open source Mac apps. Download OpenDMG.
  2. Search for Performance Monitor and press Get. OpenDMG downloads version 1.3.1 from inequitas's own GitHub release.
  3. Open it. The download is checked against its SHA-256 fingerprint and its signature is checked on your Mac before it lands in Applications.

Updates to Performance Monitor show up in OpenDMG and install with one button. No account is needed.

Prefer to do it by hand? The developer's file is on GitHub: PerformanceApp.zip (1.8 MB).

What is new in Performance Monitor 1.3.1

**Fixed**
- **The menu bar readout was unreadable on a light menu bar.** It was drawn as a white, non-template image, so it stayed white whatever the bar looked like, and it never followed a theme change. It is now drawn the way system status items are, which lets macOS retint it per menu-bar appearance. Reported and fixed by [@aleksanderprokofiev-cmd](https://github.com/aleksanderprokofiev-cmd) in [#13](https://github.com/inequitas/performancemonitor/pull/13).

**Removed**
- **Shortcuts actions.** 1.3.0 listed three of them and none ever ran. macOS found them, so they appeared in Spotlight and in the Shortcuts app, but refused to connect when one was run, reporting that Shortcuts "couldn't communicate with the app". In the system log the connection fails right after macOS reports it cannot find a Team ID for the app, which it does not have: it is ad-hoc signed rather than signed with an Apple Developer ID. That is the most likely cause, though without a Developer ID to test against it is not proven. They were announced on the strength of having been found, without anyone having run one. They can come back if the app is ever signed with a Developer ID.

The JSON file of current readings is unaffected and remains the way to get these numbers into another tool.

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