TunesBro CleanGeeker is an amazing system utility for Mac computer. Junk or tmp files can be scanned automatically within a few minutes so tons of free space are saved. Over performance is also greatly optimized. The Duplicate Finder can quickly find the duplicate across the hard drive and remove them accordingly. App Uninstaller is also a helpful function for removing apps that can't be deleted in normal ways. File Eraser is a great add-on to permanently destroy private file or document on Mac. What is more, auto-start apps can be disabled within one click to boost the rebooting time.