PerformanceMonitor icon
PerformanceMonitor icon

PerformanceMonitor

Open-source macOS menu bar system monitor with per-sensor temperatures, SSD wear and battery health. No telemetry, no subscription — and it pauses sampling when no window is visible, so it stays out of your way.

PerformanceMonitor screenshot 1
PerformanceMonitor screenshot 2
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PerformanceMonitor screenshot 3

Cost / License

  • Free
  • Open Source (MIT)

Application type

Platforms

  • Mac  Apple-Silicon (M1 or later) and macOS 14 (Sonoma) or newer
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Features

Properties

  1.  Privacy focused

Features

  1.  No registration required
  2.  Dark Mode
  3.  Works Offline
  4.  No Tracking
  5.  CPU Monitoring
  6.  Temperature Monitoring
  7.  Sits in the menu bar
  8.  No Telemetry
  9.  Apple Silicon support
  10.  Battery Monitor
  11.  Hardware Monitoring
  12.  Swift App

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PerformanceMonitor information

AlternativeTo Categories

System & Hardware, Network & Admin, OS & Utilities

GitHub repository

  •  11 Stars
  •  4 Forks
  •  3 Open Issues
  •   Updated  
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PerformanceMonitor was added to AlternativeTo by Kevin Stam on and this page was last updated .

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Official Links

AppStores & Other Links

What is PerformanceMonitor?

Performance Monitor is a free, open-source system monitor that lives in your macOS menu bar. It shows CPU, memory, network, disk, GPU, temperatures, power draw and battery health at a glance, with detail windows for per-process breakdowns, history charts and per-sensor readings.

What sets it apart:

• Genuinely light — sampling pauses when no window is visible, and all IOKit reads stay off the main thread. It should not cost you the performance it measures. • Private by design — no telemetry, no analytics, no phone-home. Everything stays on your Mac, and the source is MIT-licensed so you can verify that. • Cryptographically verified updates — auto-updates are Ed25519-signed and checked in-app before installing. • Detail you rarely get for free — SSD wear level via NVMe SMART (no root required), per-sensor CPU/GPU/board temperatures and fan speeds, Bluetooth device battery levels including AirPods (left, right and case separately), and Wi-Fi signal strength. • Available in 7 languages: English, Dutch, German, French, Spanish, Simplified Chinese and Japanese.

Requirements: Apple Silicon (M1 or later) and macOS 14 Sonoma or newer. This build is arm64-only and will not run on Intel Macs.

Note: the app is ad-hoc signed rather than notarised (it's free, and an Apple Developer ID costs €99/year), so the first launch needs right-click ? Open. Updates are signature-verified regardless.