Turn on (start up) your Mac
Press the power button .
- On Mac notebook computers, the power button is a key in the top corner of the keyboard, or a circular button next to the keyboard.
- On Mac desktop computers, the power button is a circular button on the front or back of the computer.
Turn off (shut down) your Mac
- Choose Shut Down from the Apple menu.
- Or hold down the power button for up to 3 seconds, until your Mac asks whether you're sure that you want to shut down your computer now. Click Shut Down.
Just as your Mac follows a startup process after it turns on, it follows a shutdown process before it turns off. That process includes automatically quitting all open apps and logging out of your OS X user account.
If you can't shut down your Mac because it isn't responding, you can force it to turn off without shutting down. Hold down the power button for 5 seconds, until your Mac turns off. Use this method only when you can't shut down. You'll lose any unsaved changes to documents that you have open.
- If your Mac is turned on, briefly pressing the power button wakes your Mac or puts it to sleep. This shortcut requires OS X Mavericks v10.9 or later and is equivalent to choosing Sleep from the Apple menu.
- If you use VoiceOver, be aware that there is no audible cue when your Mac goes to sleep.
- Learn keyboard shortcuts for sleep, log in, and shut down.