Safe mode is always a first option to troubleshoot if there is any problem in Operating system. Let’s have a look how you can start your MAC operating system in Safe mode if you encountered any problem.
1. Turn OFF your MAC computer and wait 10-30 seconds
2. Turn on the computer by holding the Shift Key and release
the shift key when you see the Apple logo
3. When you are prompted to log in, type your password and hold
down the shift key again as you click Log in.
To leave Safe Mode, just restart the computer normally,
without holding any keys during start up.