Onyx is one of the most complete applications out there for the maintenance and optimization of your operating system, doing things such as checking your hard disk's start-up volume, or any errors that it may find.
Modifying the route in which screenshots are saved, and the format used, increasing or lowering the viewing speed for windows on the Finder, or deactivating the graphic effects, are three of the basic functions that can be changed using the program.
OnyX can also be used to carry out maintenance tasks, such as verifying your system's permissions, rebuilding the spotlight index, or cleaning out the browser and other application’s caches.
Onyx's records allows you to access dozens of reports generated by Mac which detail all the tasks that have been carried out, as well as all the possible errors that may have occurred.
Finally, the information module lets you see different data regarding the device's hardware and users.
Note
For Mac OS 10.5 or above. Mac OS X Tiger (10.4) users must download Onyx 1.8.5; Mac OS X Panther (10.3) users must downloadOnyx 1.5.3; Mac OS X Jaguar (10.2) users must download Onyx 1.3.1.