onyx ☆
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Description:
Verify system files structure, run miscellaneous maintenance and more
Type: Cask  |  Latest Version: 3.8.7@0  |  Tracked Since: Sep 21, 2025
Links: Homepage  |  formulae.brew.sh
Category: System utilities
Tags: macos maintenance system-utility cleanup optimization
Install: brew install --cask onyx
About:
Onyx is a comprehensive system maintenance and optimization utility for macOS. It provides a graphical interface to execute a wide range of maintenance tasks, including cleaning system caches, verifying disk integrity, and managing startup items. Its primary value is in helping users keep their Mac running smoothly and efficiently through safe, automated procedures.
Key Features:
  • Disk and system cache cleaning
  • Maintenance script execution
  • Startup disk and file structure verification
  • GUI for complex Unix commands
Use Cases:
  • Performing routine system cleanup to free up disk space
  • Troubleshooting system slowdowns or minor errors
  • Running pre and post-installation maintenance scripts
Alternatives:
  • CleanMyMac X – CleanMyMac X is a commercial, more feature-rich alternative with a modern UI and real-time monitoring, whereas Onyx is a free, trusted tool focused on manual maintenance tasks.
  • CCleaner – CCleaner offers a simpler, more limited set of cleaning tools for macOS compared to Onyx's deep system integration and extensive maintenance options.
Version History
Detected Version Rev Change Commit
Jan 1, 2026 1:25am 3.8.7 0 VERSION_BUMP 7ecb5f2c
Sep 21, 2025 11:51am 3.8.7 0 VERSION_BUMP be52f7c3
Sep 20, 2025 5:07pm 3.8.7 0 VERSION_BUMP d8c82aed
Sep 15, 2025 5:58pm 3.1.9 0 VERSION_BUMP d4fe4e15
Sep 15, 2025 12:45pm 3.8.7 0 VERSION_BUMP 70e3d9c1
Aug 21, 2025 10:21am 3.1.9 0 VERSION_BUMP d3c5cb63
Aug 2, 2024 8:39am 3.1.9 0 VERSION_BUMP 3c0b4153
Aug 2, 2024 8:14am 3.1.9 0 VERSION_BUMP 90b7bef3
Jul 22, 2024 2:56pm 3.1.9 0 VERSION_BUMP da956330
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