OnyX is a maintenance, optimization, and customization utility for macOS systems. It allows users to verify the file system structure, perform cleaning tasks, and configure hidden parameters in the operating system and Apple applications. It includes operations for deleting caches, rebuilding indexes and databases, and adjusting numerous system preferences. Each major version of macOS requires a specific version of OnyX to function correctly.

Alternatives to OnyX:

For OnyX there are 10 alternative programs. Free: 8, paid: 2.

optimizerDuck

OptimizerDuck provides over 30 system tweaks in six categories: Performance, Privacy, GPU, Power, Bloatware & Services, and User Experience.

Price: Free Size: 83.3 MB Version: 2.29.0 OS: Windows

Fluent Cleaner

Fluent Cleaner is a Windows cleaning tool that removes temporary files, browser caches, obsolete registry entries, and residual application data.

Price: Free Size: 45.1 MB Version: 26.05.22 OS: Windows

Easy System Utility

Easy System Utility is a complimentary software application built for Windows 10 and Windows 11, focused on system cleaning and performance optimization.

Price: Free Size: 2.2 MB Version: 1.0 OS: Windows