STARTING MAC IN SAFE-MODE

For MAC OSX (Only OSX will be supported in this post)

If you need to start your Mac machine in Safe Mode (Safe Boot), please follow these steps:
1. Make sure you machine is turned off/shut down.
2. Now press the power button.
3. As soon as you hear the startup tone, press the Shift key. The Shift key should be held in a fraction of seconds, but make sure, you don't do it before the tone.
4. Leave the Shift key when you see the start up screen (gray Apple icon) and the progress indicator (in Mac it is a colored spinning wheel).

While startup in Mac OS X 10.4 or newer version, you will see "Safe Boot" on the first login window, (which will appear even if you do a normal login automatically.
During startup in Mac OS X 10.2 through 10.3.9, you will see "Safe Boot" on the Mac OS X startup screen.
If you don't want to start you Mac in SafeMode, just restart the machine normally, without holding any keys during startup. If you are new to Mac then please go to this guide.