When you are asking “How do I boot up my Mac into Safe Mode?”, you are looking for a way to minimize the number of preferences and system extensions on the computer. Safe Mode is an effective method to solve performance issues on MacBook Pro, MacBook Air, iMac, and even Mac mini. It works for Yosemite, El Capitan, Mavericks, Sierra, and High Sierra alike. You can initiate Safe Boot for your Mac with command prompt. The same can also be done from a keyboard.
The article has been written to help fellow Apple aficionados to troubleshoot issues they are having with their Macs. It explains in detail what is Safe Mode, how it works, and when to initiate it.