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Does reinstalling Mac OS X Lion delete everything?
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 redownload OS X Lion?
Hold the Option key and click on “Purchases” Option-click on “OS X Lion” from the purchased app list. “Installed’ should now say “Install” which allows you to re-download OS X Lion, otherwise you can Option-click again on the “Install” button to start re-downloading OS X Lion, shown in the screenshot above.
Is there a way to reinstall OS X after erase?
If the newer OS X version is blocking you from using the Install Disc, then you will need to startup in Recovery and use Disk Utility to erase the drive. see > How to reinstall macOS – Apple Support You need to install the original OS X that is on the install disc and let the new owner update with their Apple id.
How do I reinstall mountain lion on a Mac?
Restart the Mac and hold down Command+R to enter Recovery Mode. That boots to a hidden partition on the drive which will allow you to reinstall the OS. If it asks for an Apple ID, it will be expecting the ID and password of the person who purchased Mountain Lion (10.8.x).
How to reinstall Mac OS from macOS recovery?
Reinstall from macOS Recovery. 1 1. Start up from macOS Recovery. To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on 2 2. Decide whether to erase (format) your disk. 3 3. Install macOS. See More….
How do I reinstall OS X from scratch?
Follow these steps: Install or Reinstall OS X from Scratch Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears.