OnyX
OnyX is a macOS maintenance and customization utility used to verify, clean, and adjust various system and app settings.
What is OnyX?
OnyX by titanium is a utility app for macOS that combines maintenance tools, cleanup functions, system verification, and hidden setting adjustments in one interface. People commonly use it to run maintenance scripts, rebuild indexes or databases, clear certain caches, and change Finder, Dock, Safari, or other macOS behavior that is not always exposed in standard settings.
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Safety overview
Status: Use with caution
OnyX is a legitimate and widely known utility, but it can make system-level changes and remove caches or rebuild data that may affect app behavior until macOS recreates it. Using the wrong options can reset preferences, slow the Mac temporarily during rebuilding, or change settings you did not intend to modify.
Recommendation: Keep it if you actively use advanced macOS maintenance or customization features and understand the options you run. If you do not use it, it is usually optional and can be removed, but review any saved settings or logs you may want to keep first.
Common paths
/Applications/OnyX.app
Preference paths
~/Library/Preferences/com.titanium.OnyX.plist
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