It gives users an easy way to clean up their own Mac without needing to learn how to enter in complex commands or call in someone else to do it for you. Some of these include cleaning and maintaining your mac Yes, Onyx is very safe to use on your Mac. There are a number of functions that are carried out by OnyX mac cleaner. What Does OnyX mac cleaner do? As one of the best mac cleaning software, OnyX ensures that it gives a thorough clean with a number of functions that allows your mac to perform at its best levels. Service catalog: Safe Cleanup, Antivirus, VPN Private Connec OnyX is a multifunction utility that you can use to verify the structure of the system files, to run miscellaneous maintenance and cleaning tasks, to configure parameters in the Finder, Dock, Safari, and some Apple applications, to delete caches, to remove certain problematic folders and files, to rebuild various databases and indexes, and. Remove the apps you no longer need and save GBs of storage.