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 do I delete a folder that won’t delete Mac?

If the item is a folder, try throwing away each of the files within it. Remove files that give you errors, and then try trashing the folder again. You can force the Trash to empty even locked files by dragging them to the Trash, then holding down Option , and then, from the Finder menu, selecting Empty Trash.

Can I delete Mac OS installer?

If you only want to delete the installer, you can select it from the Trash, then right-click the icon to reveal the Delete Immediately… option for just that file. Alternatively, your Mac can delete the macOS installer on its own if it determines that your hard drive doesn’t have enough free space.