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.
EU
Features
Properties
- Privacy focused
Features
- No registration required
- Dark Mode
- Works Offline
- No Tracking
- CPU Monitoring
- Temperature Monitoring
- Sits in the MenuBar
- No Telemetry
- Apple Silicon support
- Battery Monitor
- Hardware Monitoring
- Swift App
PerformanceMonitor News & Activities
Recent activities
- Kevin-6248 liked PerformanceMonitor
- Kevin-6248 added PerformanceMonitor
Kevin-6248 added PerformanceMonitor as alternative to Activity Monitor, Stats, iStat Menus and Stats Panel
PerformanceMonitor information
Developed by
Kevin Stam Licensing
Open Source (MIT) and Free product.Written in
Alternatives
6 alternatives listedSupported Languages
- English
- German
- Japanese
- Chinese
- Spanish
- Dutch
- French
AlternativeTo Categories
System & Hardware, Network & Admin, OS & UtilitiesGitHub repository
- 4 Stars
- 3 Forks
- 5 Open Issues
- Updated
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.