What does reinstalling macOS do?
This installs the system that came with your Mac when it was new. It isn’t associated with your Apple ID, so the new owner can use the App Store to upgrade to a later version using their Apple ID.
Does installing a new OS delete everything Mac?
Reinstalling macOS from the recovery menu does not erase your data. To gain access to the disk depends on what model Mac you have. An older Macbook or Macbook Pro likely has a hard drive that is removable, allowing you to connect it externally using an enclosure or cable.
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….
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.
Can you install the latest version of macOS?
If you’ve just erased your entire startup disk, you may only be offered the macOS that came with your Mac, or the closest version that is still available. You can also use these methods to install macOS, if the macOS is compatible with your Mac: Use the App Store to download and install the latest macOS.
How do I reinstall Mac OS with administrator password?
If you’re asked to select a user you know the password for, select the user, click Next, then enter their administrator password. Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions. Follow these guidelines during installation: