In this video we look at Safe Boot (Safe Mode) for macOS. Safe Boot is a diagnostic tool that can be used to help you troubleshoot issues with your Apple Macintosh computer.
Running your Apple Macintosh computer in Safe Boot would be the second stage of the diagnostic process when trying to isolate issues with your computer. The first stage would be to run a hardware diagnostic test. We show you how to run a diagnostic tests on your computer in the post How to run an Apple Diagnostics test on an Apple Macintosh computer – macOS troubleshooting.