Slow performance may mean you’re about to reach the storage limit on your Mac. Disable the automatic protection features of utilities.Repair Permissions after installing new software.Maintain ample free space on your startup disk.How can I improve the performance of my imac? Press Command+A to select all files and delete them.In the window that appears, you will see all your cache files.Enter the following command into the field and select Go: ~/Library/Caches.Here’s how to clean junk files on Mac and remove user cache:
This is one of the best tools to clean up your Mac and it offers a wide range of features in addition to just cleaning up your Mac.