Starting up in Safe Boot mode doesn't bypass the VRAM-the VRAM is a set of chips containing the Mac's video image, and if these chips were bypassed, you'd see nothing onscreen. Safe Boot doesn't let some extensions load, which activate specific extended functions of various chips, including some function controlled by circuitry that's damaged. The terms “safe mode” and “safe boot” are often interchanged and misunderstood. In reality, we have two different processes that depend on each other. To start your MacBook Pro in safe mode, you need to boot it safely. Eve online administration. It's a bit different from the normal booting of your Mac. Here’s how to do it. Safe Mode is a macOS diagnostic mode designed to fix several problems in your Mac. So if you have hit a major snag with your Mac, here's a helpful guide to boot it into a safe mode to fix it. In this article, I will show you the 11 steps that I take to fix common Mac problems, such as a slow system, a spinning beach ball and more.
If you’ve booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.