Also, it's a good time to delete any application you no longer use that's sitting there eating up some Megabytes (disk space) Now you need to investigate and find whatever you installed LAST or Any suspicious App ( you can find installation dates on the left side of the Application Directory). So now your Mac has restarted in SAFE Mode and you need to navigate to the APPLICATION Directory ( just open FINDER and you will see it on the left side. Restart the Mac while holding the LEFT SHIFT key and release when you see the Apple Logo ( this time, do a soft restart by clicking the Apple Logo in the top left corner and select restart) If the first Aid is successful, then proceed > Note: if your SSD or Hard drive is the issue, this will not be successful and it's probably what's causing the sluggishness you will need a new SSD or HAdr Drive. The mac has now restarted RECOVERY Mode and you need to go to the DISK Utility Option > Select the Main Drive ( usually the Macintosh HD) > select the First Aid tab then run it. Restart the Mac while holding COMMAND + R keys and release when you see the Apple Logo ( don't worry if you held them too long)

Then start reflecting on the last Apps you have installed ( you will need to remove from the Application Directory).

You need to do a hard shutdown (by pressing the shutdown button until the computers shuts down) If you feel your mac has gotten slow, then let's do a Mac Tune UP. As an Apple Certified Tech, i would advise never to go the CleanMyMac or Malwarebyte way.

Cleanmymac 3 review reddit