Restart your Mac. While the startup disc is waking up, hold down the Command+R keys simultaneously. You’re Mac will boot into macOS Recover. Click on Reinstall macOS (or Reinstall OS X where applicable) to reinstall the operating system that came with your Mac.
How do I wipe my Mac and reinstall OS X?
If you’re reinstalling on a Mac notebook computer, plug in the power adapter.
- Start up your computer in macOS Recovery: …
- In the Recovery app window, select Disk Utility, then click Continue.
- In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.
How do I do a clean install of Mac OS X?
Step 4: Wipe your Mac
- Connect your boot drive.
- Start up – or restart – your Mac while holding down the Option key (also known as Alt). …
- Choose to install your chosen version of macOS from the external drive.
- Select Disk Utility.
- Select your Mac’s start up disc, probably called Macintosh HD or Home.
- Click on Erase.
Will I lose everything if I reinstall OS X?
2 Answers. Reinstalling macOS from the recovery menu does not erase your data. However, if there is a corruption issue, your data may be corrupted as well, its really hard to tell. … Reinatalling the os alone does not erase data.
How do I reset my Mac desktop to factory settings?
To reset your Mac, first restart your computer. Then press and hold Command + R until you see the Apple logo. Next, go to Disk Utility > View > View all devices, and choose the top drive. Next, click Erase, fill out the required details, and hit Erase again.
How do I restore my Mac Air to factory settings?
How to reset a MacBook Air or MacBook Pro
- Hold down the Command and R keys on the keyboard and turn on the Mac. …
- Select your language and continue.
- Choose Disk Utility and click Continue.
- Choose your startup disk (named Macintosh HD by default) from the sidebar and click the Erase button.
How do you restore a Mac?
Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds. This clears user settings from memory and restores certain security features that might have been altered.
How do I reinstall OSX without losing files?
Option #1: Reinstall macOS without Losing Data From Internet Recovery
- Click the Apple icon>Restart.
- Hold down the key combination: Command+R, you will see the Apple logo.
- Then choose “Reinstall macOS Big Sur” from utilities window and click “Continue”.
How do I boot my Mac into recovery mode?
Reboot your Mac. Hold down Option/Alt-Command-R or Shift-Option/Alt-Command-R to force your Mac to boot into macOS Recovery Mode over the internet. This should boot the Mac into Recovery Mode.
Will reinstalling macOS fix problems?
However, reinstalling OS X isn’t a universal balm that fixes all hardware and software errors. If your iMac has contracted a virus, or a system file that was installed by an application “goes rogue” from data corruption, reinstalling OS X likely won’t solve the problem, and you’ll be back to square one.
How do I repair a Mac installation?
Repairing a disk
- Restart your Mac, and press Command + R, while it’s restarting.
- Select Disk Utility from the macOS Utilities menu. Once Disk Utility has loaded, choose the disk you wish to repair – the default name for your system partition is generally “Macintosh HD”, and choose ‘Repair Disk’.
What happens if I reinstall a new copy of macOS?
macOS Reinstallation Deletes Everything, What Can I Do
Reinstalling macOS of macOS Recovery can help you replace the current problematic OS with a clean version quickly and easily. Technically speaking, simply reinstalling macOS won’t erase your disk either delete files.