How to start/boot macOS in safe mode - Big Sur 11.0, Catalina 10.15, or Mojave 10.14

In order to start or boot the macOS in safe mode,

Boot macOS safe mode: Big Sur 11.0, Catalina 10.15, or Mojave 10.14 (Intel-Based)

1. Click on the Apple Icon on the Mac Menu and Select Shut Down,
2. Once your Mac computer is shutdown, wait for 10 seconds,
3. Now restart your Mac by pressing the power button and immediately press and hold the Shift key
4. You can release the Shift key once you see the Login Window

Start macOS safe mode: Big Sur 11.0 (M1 Apple Silicon based)

1. Click on the Apple Icon on the Mac Menu and Select Shut Down,
2. Once your Mac computer is shutdown, wait for 10 seconds,
3. Now restart your Mac by pressing the power button until you see the startup disks and Options,
4. Now Press Shift key, click - Continue in Safe Mode.