
How to fix: remove unnecessary Login Items. applications and services that automatically launch every time you press the start button on your Mac).


The same goes with a MacBook Pro. Your Mac will take longer to fully boot up if it has dozens of login items and auto launch agents (i.e. Like a car, it can be much slower to take off to 60 MPH if you’ve loads of heavy items in the trunk. Once completed, your Mac’s overall performance would improve automatically. The process could take a significant amount of time to complete, and lots of system resources are required for the task. For example, Spotlight has to scan the internal disk drive and reindex all the files, likewise, Photos (formerly iPhoto) may update the while photos library as well. Why this helps: apps like Spotlight and Photos usually need quite some time to re-index data.

How to fix: keep your Mac on for 24-48 hours, and restart several times after that. This is normal because some apps (especially Spotlight, and Photos) need to re-index or update its data. If you just updated your MacBook Pro to the latest macOS, you probably have noticed that your Mac takes a bit longer to fully load up and respond to general tasks.
