Quick Answer: What Happens If You Delete Install macOS High Sierra?

2 Answers. It is safe to delete, you will just be unable to install macOS Sierra until you re-download the installer from the Mac AppStore. Nothing at all except you would have to download it again if you ever need it. After install, the file would usually be deleted anyway, unless you move it to another location.

Can I delete macOS install?

Yes, you can safely delete the MacOS installer applications. You might want to put them aside on a flash drive just in case you need them again sometime.

Do I need install macOS High Sierra?

Apple’s macOS High Sierra update is free to all users and there is no expiration on the free upgrade, so you don’t need to be in a rush to install it. Most apps and services will work on macOS Sierra for at least another year.