: Open the downloaded .dmg file and drag the OnyX icon into your Applications folder . Grant Permissions :
: Go to System Preferences > Security & Privacy > Privacy . Select Full Disk Access and click the lock to make changes. OnyX 4.1.9 for macOS Monterey 12
: You must use the version specifically for your OS. Visit the Titanium Software downloads page and select the macOS Monterey 12 version (OnyX 4.2.1 is the latest stable release for Monterey, though 4.1.9 is also common) . : Open the downloaded