It has a version for each macOS release, so download the version for your operating system!Īll-in-one system maintenance, tweak and cleaning tool Onyx is a free and very complex macOS application created to cope with both these aspects, while also providing its users with a very simple and intuitive interface. 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. Description for OnyX 3.5.1 OnyX 3.5.1 for macOS Mojave 10.14įree macOS application designed to help you perform a large variety of optimization, maintenance, and customization tasks via a very simple and intuitive interface