onyx ☆
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Description:
Verify system files structure, run miscellaneous maintenance and more
Type: Cask  |  Latest Version: 4.0.2@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
Aug 29, 2026 2:45pm 4.0.2 0 VERSION_BUMP 057d0719
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
Feb 19, 2024 11:16pm 3.1.9 0 VERSION_BUMP b65aa1ff
Jan 24, 2024 9:04am 3.1.9 0 VERSION_BUMP eb57fbce
Nov 28, 2023 9:01am 3.1.9 0 VERSION_BUMP 11e34fd5
Oct 27, 2023 8:53am 3.1.9 0 VERSION_BUMP 71dab030
Oct 10, 2023 9:39am 3.1.9 0 VERSION_BUMP 786023ee
Sep 27, 2023 8:18am 3.1.9 0 VERSION_BUMP b3be6635
Sep 19, 2023 10:21pm 3.1.9 0 VERSION_BUMP e07fa038
Apr 12, 2023 9:31pm 3.1.9 0 VERSION_BUMP ddd6af51
Apr 11, 2023 9:31pm 3.1.9 0 VERSION_BUMP 626415d0
Mar 28, 2023 10:31am 3.1.9 0 VERSION_BUMP 38c98915
Feb 15, 2023 3:21pm 3.1.9 0 VERSION_BUMP 6dd5226e
Feb 3, 2023 1:10pm 3.1.9 0 VERSION_BUMP d12e3765
Jan 29, 2023 5:41am 3.1.9 0 VERSION_BUMP 880fce1e
Jan 1, 2023 5:07am 3.1.9 0 VERSION_BUMP cf1b0b2e
Dec 28, 2022 6:42am 3.1.9 0 VERSION_BUMP 0153bce0
Dec 12, 2022 10:35am 3.1.9 0 VERSION_BUMP b8d66b3d
Dec 5, 2022 5:28pm 3.1.9 0 VERSION_BUMP 1410abe0
Dec 3, 2022 4:37pm 3.1.9 0 VERSION_BUMP a8ae33b3
Nov 23, 2022 6:09am 3.1.9 0 VERSION_BUMP 880708e4
Nov 6, 2022 7:46am 3.1.9 0 VERSION_BUMP 7399b739
Nov 1, 2022 8:24am 3.1.9 0 VERSION_BUMP ba344164
Nov 1, 2022 7:34am 3.1.9 0 VERSION_BUMP 9b1b40cb
Oct 24, 2022 9:35am 3.1.9 0 VERSION_BUMP d87426f3
Sep 30, 2022 10:14pm 3.1.9 0 VERSION_BUMP 7147e760
Sep 30, 2022 1:52pm 3.1.9 0 VERSION_BUMP a01a1443
Aug 24, 2022 2:16am 3.1.9 0 VERSION_BUMP 59eb39ce
Aug 2, 2022 5:25am 3.1.9 0 VERSION_BUMP ca8d91bb
Jul 19, 2022 1:35am 3.1.9 0 VERSION_BUMP bc456fb6
Jun 19, 2022 5:36am 3.1.9 0 VERSION_BUMP 0f39b41a
Jun 16, 2022 10:39am 3.1.9 0 VERSION_BUMP 6372986b
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