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How do I remove a second operating system from my Mac?
How to Remove OS X Mountain Lion (or Any Other Mac OS X Boot Partition)
- Open Disk Utility and select the primary hard drive.
- Click on “Partition”
- Select the “Mountain Lion” partition and click the [-] button to delete the partition.
- Confirm the partition removal and quit Disk Utility.
Can I delete OS X Install Data?
There was a folder called ‘MacOS Install Data’ that needed to be deleted. If you have permission issues boot into recovery (⌘R), select terminal from the menu bar, type ‘csrutil disable’. Reboot, delete folder, reboot back into recovery mode, access terminal again type ‘csrutil enable’ to renable protection and done.
How to remove Windows from Mac OS 10?
Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed. Quit DU and return to the main menu.
Is it possible to run two versions of Mac OS?
So, you want to run two versions of the macOS operating system on your Mac. Your method will depend on which version of macOS you are already running. If you are running High Sierra on an SSD, or have Big Sur, Mojave or Catalina installed, this process is much easier because your Mac will be using the Apple File System APFS.
How do I reinstall OS X on my computer?
Click on the Apply button and wait until the process has completed. Quit DU and return to the main menu. Reinstall OS X: Select Reinstall OS X and click on the Continue button. Be sure to select the correct drive to use if you have more than one.
How do I install a new OS on my Mac?
Run the installer, but make sure you select the new volume you created and install the alternative macOS on that – not your main volume. Now wait while your Mac installs the new OS on that volume. Once it’s done your Mac will open up in the volume with the new OS installed.