Start up or Restart using macOS Recovery
- Turn on or restart your MacBook and hold down the Option+Command (?)+ R keys.
- Use Disk Utility to erase your startup disk AND any other internal hard disk.
- Select your drive's name from the left side list and click the Erase.
In this regard, how do you do a hard reboot on a Mac?
Hold the power button for 5 seconds to shut off. Power on and hold the Shift key down when you hear the startup tone. This should perform a safe boot. Then goto System Preferences > Startup Disk > select your MacIntosh HD > click restart.
In the menu bar, choose Apple menu - Restart. Once your Mac restarts (and the gray screen appears), hold down the Command and R keys. Select your startup disk on the left, then click the Erase tab. Choose Mac OS Extended (Journaled) from the Format menu, enter a name, then click Erase.
Connect the power adapter to the Mac. On the MacBook / Pro's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time. Release all keys and the power button at the same time – the little light on the MagSafe adapter may change colors briefly to indicate the SMC has reset.
In the menu bar, choose Apple menu > Restart. As your Mac restarts, hold down the Command and R keys until the macOS Utilities window appears. Select your startup disk on the left, then click Erase. Click the Format pop-up menu, choose Mac OS Extended, enter a name, then click Erase.
Hold the power button for 5 seconds to shut off. Power on and hold the Shift key down when you hear the startup tone. This should perform a safe boot. If successful, goto System Preferences > Startup Disk > select your MacIntosh HD > click restart.
Press the Command and R keys at the same time when the grey screen appears and hold them until you see the Apple logo. A small loading bar will appear under the logo. Sit tight as your system boots into Recovery Mode. Click the Utilities tab in the top menu bar, select Terminal, type resetpassword and press Enter.
Once your files are backed up, shut down your MacBook Pro. Plug it into the AC adapter, and then boot it back up. Finally, press and hold “Command-R” (the “Command” and “R” keys at the same time) to start the restore process. Hold these keys until the Apple logo appears on the screen, and then release them.
Step 2: Check your Mac's hard drive
- Restart (or start up) your Mac while holding down the Command and R keys.
- When the Apple logo appears, let go of those keys.
- The Mac will start Recovery System.
- A window called Mac OS X Utilities will appear.
- Click on Disk Utility then click the Continue button.
Before you begin, you need to be connected to the Internet. Choose Apple menu > Restart, and then hold down the Command (?) and R keys while the computer restarts. Select “Disk Utility,” and then click Continue. Select your startup disk from the list on the left, and then click the Erase tab.
How to Restart Your Mac
- Press the power button (or press Control+Eject) and, when a dialog box appears, click the Restart button.
- Choose the Apple key and then click Restart.
- Press Control+Command+Eject (or Control+Command+Power button).
Select your startup drive on the left (typically Macintosh HD), switch to the Erase tab and choose Mac OS Extended (Journaled) from the Format drop-down menu. Select Erase and then confirm your choice. Quit out of the Disk Utility app, and this time choose Reinstall OS X and Continue.
Erase all data from Macbook Pro
- Start by shutting your MacBook off.
- Restart and quickly press the CMD and the R keys together.
- Click Disk Utility and click Continue.
- Go to Applications ›› Utilities ›› Disk Utility.
- Be sure all your external hard drives are unplugged from your Mac.
- You will see your hard drive name listed twice.
Shut down the Mac and connect it to your MagSafe adapter and a wall outlet as usual. Hold down the Shift+Control+Option+Power button at the same time for a few seconds. Release all keys at the same time, then boot the Mac as usual.
Like standard Recovery Mode, Internet Recovery Mode lets you: Scan, verify and repair connected drives with Disk Utility. Erase, install or reinstall OS X that was factory-preloaded. Restore your Mac from a Time Machine backup. Check your Internet connection or get help online using Safari.
3. Restore Mac Back To Factory
- Restart your Mac and hold down the “Command” and “R” keys during startup until you Mac is in Recovery Mode.
- Select “Disk Utility” and click “Continue”
- Choose your main startup disc (named “Macintosh HD” by default) and click “Unmount”
Erase the hard drive:
- Select Disk Utility from the main menu and click on the Continue button.
- After DU loads select your startup volume (usually Macintosh HD) from the left side list. Click on the Erase tab in the DU main window.
- Set the format type to Mac OS Extended (Journaled.)
- Quit DU and return to the main menu.
How to restore your Mac from a Time Machine backup
- Restart your Mac.
- While the startup disc is waking up, hold down the Command and R keys simultaneously.
- Select Restore from Time Machine Backup from the list of available options.
- Click Continue.
- Click Continue on the Restore Your System Page.
- Before you begin, you need to be connected to the Internet.
- Choose Apple menu > Restart, and then hold down the Command (?) and R keys while the computer restarts.
- Select “Disk Utility,” and then click Continue.
- Select your startup disk from the list on the left, and then click the Erase tab.
Open Time Machine preferences from the Time Machine menu in the menu bar. Or choose Apple (?) menu > System Preferences, then click Time Machine. Click Select Backup Disk, Select Disk, or Add or Remove Backup Disk. Select a backup disk from the list, then click Use Disk.
Launch Disk Utility, located in Applications > Utilities. Locate the drive name from the left hand side of Disk Utility and click on it. Click on the “Erase” tab across the top. Next to “Format:” click the contextual menu and select “Mac OS Extended (Journaled)”
Time Machine is a backup software application distributed as part of macOS, desktop operating system developed by Apple. The software is designed to work with AirPort Time Capsule, the Wi-Fi router with built-in hard disk, as well as other internal and external disk drives. It was introduced in Mac OS X Leopard.