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.
Can you reinstall macOS without losing data?
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”.
What happens if I reinstall macOS?
2 Answers. 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.
How do I reset my Mac without losing everything?
Step 1: Hold the Command + R keys until the MacBook’s utility window hasn’t opened. Step 2: Select Disk Utility and click on Continue. Step 4: Select the format as MAC OS Extended (Journaled) and click on Erase. Step 5: Wait till the MacBook is completely reset and then go back to the Disk Utility’s main window.
What to do when macOS installation Cannot be completed?
What to Do When the macOS Installation Couldn’t Be Completed
- Restart Your Mac and Retry the Installation. …
- Set Your Mac to the Correct Date and Time. …
- Create Enough Free Space for macOS to Install. …
- Download a New Copy of the macOS Installer. …
- Reset the PRAM and NVRAM. …
- Run First Aid on Your Startup Disk.
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 long does macOS reinstall take?
Depends on what kind of Mac you have and method of install. Typically, if you have a stock 5400 rpm drive, it takes about 30 – 45 minutes using a USB installer. If you are using the internet recovery route, it can take over an hour, depending on speed of internet etc.
How do I wipe and reinstall my Mac?
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 you completely reset a Mac?
How to Factory Reset: MacBook
- Restart your computer: hold the power button > select Restart when it appears.
- While the computer restarts, hold down the ‘Command’ and ‘R’ keys.
- Once you see the Apple logo appear, release the ‘Command and R keys’
- When you see a Recovery Mode menu, select Disk Utility.
How do I restore my Mac to original settings?
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 the memory and restores certain security features that may have been altered.
How do you factory reset a Mac computer?
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.