Tweaking applications for macOS come in various shapes and prices, and you are free to pick the one that meets your needs, be it focused on finding and fixing as many system errors and problems as possible or on boosting your Mac's overall performance. OnyX is a multifunction utility that you can use to verify the startup disk and the structure of its system files, to run miscellaneous maintenance and cleaning tasks, to configure parameters in the Finder, Dock, Safari, and some of Apple’s applications, to delete caches, to remove certain problematic folders and files, to rebuild various databases and indexes, and more.
