Select your startup disk on the left, then click Erase. Click the Format pop-up menu (APFS should be selected), enter a name, then click Erase. After the disk is erased, choose Disk Utility > Quit Disk Utility. In the Recovery app window, select “Reinstall macOS,” click Continue, then follow the onscreen instructions.
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How do I wipe my Mac but keep OS?
Click on your hard drive and select the “Erase” tab. Select “Mac OS Extended (Journaled)” from the Format pop-up menu. Type a name for your hard disk. Click “Erase.” To ensure that your data can’t be recovered, click the “Security Options” button and select a method of deletion.
How do I wipe my Mac hard drive and start over?
How to Wipe a Mac Hard Disk Drive (HDD)
- Make sure your Mac is turned off.
- Press the power button.
- Immediately hold down the command and R keys.
- Wait until the Apple logo appears.
- Select “Disk Utility” from the OS X Utilities list. …
- Select the disk you’d like to erase by clicking on it in the sidebar.
Does reinstall Mac OS wipe hard drive?
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.
What happens if you erase your Mac hard drive?
Before erasing your Mac
Make a backup of any files you want to keep. Erasing your Mac permanently deletes the files on it. If you want to restore your Mac to its factory settings, for example when you want to prepare it for a new owner, first find out what to do before you sell, give away or trade in your Mac.
How do I delete everything except operating system?
How Can I Securely Delete Everything Except the Operating System? Five Steps to Get as Close as You Can
- Delete and uninstall data and programs.
- Remove users.
- Run a disk cleaning utility.
- Delete some system files.
- Wipe free space.
Why won’t my Mac let me erase the hard drive?
It’s not usually possible to erase the startup disk because your Mac is using it to run macOS. Recovery Mode is a special partition on your Mac you can use to restore from a backup, reinstall macOS, get online support, or erase your startup disk. You should back up your Mac before trying to erase or reformat it.
Where is recovery on Mac?
How to start Mac in Recovery Mode
- Click on Apple logo at the top left of the screen.
- Select Restart.
- Immediately hold down the Command and R keys until you see an Apple logo or spinning globe. …
- Eventually your Mac will show the Recovery Mode Utilities window with the following options:
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Will reinstalling macOS get rid of malware?
While instructions are available to remove the latest malware threats for OS X, some may choose to simply reinstall OS X and start from a clean slate. … By doing this you can at least quarantine any malware files found.
What happens if you reinstall macOS?
It does exactly what it says it does–reinstalls macOS itself. It only touches operating system files that are there in a default configuration, so any preference files, documents and applications that are either changed or not there in the default installer are simply left alone.
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.
Can you recover an erased hard drive?
Still, if you’ve wiped your hard drive and really wish you hadn’t, it’s entirely possible that your data can be recovered. When data is deleted from a hard drive, it’s not erased. Instead, the locations of the bytes that form the document, MP3 file etc. are removed meaning the data itself still exists.
