OnyX
System maintenance utility for cleanup, verification, and hidden settings. ![Freeware][Freeware Icon]
OnyX is a multifunction utility for macOS that lets users verify the startup disk and system‑file structure, clean caches and temporary files, and perform other routine maintenance tasks without using the command line. It also provides a graphical interface for uninstalling applications and rebuilding various system databases and indexes.
The tool includes options to adjust hidden parameters in Apple applications such as Finder, Dock, and Safari, allowing users to fine‑tune behavior that is otherwise inaccessible through standard preferences.
A separate build is released for each major macOS version, supporting both Intel‑based Macs and Apple‑silicon models, and the software is offered as freeware. Its stable, long‑standing development history makes it suitable for Mac users who need a consolidated, GUI‑driven way to keep their systems clean and correctly configured.
Reviews
Loading reviews…
Similar apps
System Monitoring & Maintenance
Cocktail
Cleans, repairs and optimises computer systems
System Monitoring & Maintenance
PureMac
Free, open-source macOS cleaner with no telemetry. Cleans system and user caches, Xcode junk, Homebrew cache, mail attachments, and finds…
System Monitoring & Maintenance
Northern Softworks Cache Cleaner
General purpose system maintenance tool
File Management & Transfer
AppCleaner
Thoroughly uninstall apps. ![Freeware][Freeware Icon]
AI Chat & Voice Agents
Onyx Community Edition
Chat UI that works with any LLM. It comes loaded with advanced features like agents, web search, RAG, MCP, deep research, Connectors to 40+…
File Management & Transfer
The Unarchiver
Unarchive many different kinds of archive files. ![Freeware][Freeware Icon]