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Mac Performance MonitorWhySoSlow
Free

Free and open source.

 Freemium

Home edition is a free download; a Professional edition is sold separately.

macOS Windows
  • Recorded history to find when a slowdown began
  • Compare process traces on one timeline
  • Checks many performance factors in one place
  • Report with concrete improvement suggestions
  • Apple silicon only
  • Requires macOS 15 or later
  • Windows only
  • Some features are reserved for the paid Professional edition
Downloadable app Downloadable app
Open source Closed source
License not stated License not stated
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.