Here's a nice checklist osxdaily: http://osxdaily.com/2012/03/04/mac-maintenance-tips/ http://osxdaily.com/2012/03/04/mac-maintenance-tips/ Most of the time, I

Here's a nice checklist osxdaily: http://osxdaily.com/2012/03/04/mac-maintenance-tips/ http://osxdaily.com/2012/03/04/mac-maintenance-tips/ Most of the time, I just clean up my desktop and reorganize files. Also, at least once a month, I simply navigate in the finder and delete old, barely used and unneeded files and apps. If I find my Mac to be significantly slow, I backup files and apps I only need, and do a clean install of macOS.