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.
Does reinstalling Mac OS remove files?
Reinstalling Mac OSX by booting into the Rescue drive partition (hold Cmd-R at boot) and selecting “Reinstall Mac OS” does not delete anything. It overwrites all system files in-place, but retains all your files and most preferences.
Can you reinstall macOS without losing data?
Step 4: Reinstall Mac OS X without Losing Data
When you get the macOS utility window on the screen, you can just click on the “Reinstall macOS” option to proceed. … In the end, you can just choose to restore data from the Time Machine backup.
What happens when you reinstall Mac OS?
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.
How long does reinstalling Mac OS take?
macOS generally takes 30 to 45 minutes to install. That’s it. It doesn’t “take so long” to install macOS. Anyone making this claim has clearly never installed Windows, which not only generally takes over an hour, but includes multiple restarts and babysitting to get to completion.
Will I lose everything if I update my Mac?
A quick side note: on Mac, updates from Mac OS 10.6 are not supposed to generate data loss issues; an update keeps the desktop and all personal files intact. The following explanations will be useful if your OS is new, to avoid data loss.
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.
How do I wipe my Mac and start fresh?
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.
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 wiping Mac speed it up?
The power and speed of your computer is determined by the CPU, not your disk drive. Getting rid of programs such as Mac Keeper and its ilk will go a long way to helping your computer run better. Without more information I can tell you that performing a clean install can’t hurt.
Will a factory reset make my Mac faster?
It depends on just howany tools you have installed. Mac OS X which is mostly used to open browser and email, will not become faster once it has downloaded all your email again and so on. You are much better off by deleting utilities that you run on startup.
How do I reinstall my Mac OS?
Reinstall macOS
- Install the latest version of macOS compatible with your computer: Press and hold Option-Command-R.
- Reinstall your computer’s original version of macOS (including available updates): Press and hold Shift-Option-Command-R.