In this hands-on session, we will show you how to optimize your Mac and how to tell what condition your machine is in. We’ll talk about the things that slow your iMac or laptop down, and use several tools including Disk Utility to fix problems, and Disk Inventory X to locate large or duplicate files.

https://learn.royalwise.com/visitor_catalog_class/show/203318/100119---Spring-Clean-Your-Mac