Here are the steps Apple describes: Start up your Mac pressing Shift-Option/Alt-Command-R. Once you see the macOS Utilities screen choose the Reinstall macOS option. Click Continue and follow the
How to reinstall macOS if macOS Recovery is unavailable At this point, the Mac should start to download the recovery files from the internet and show a status bar. When complete, it should reinstall macOS Recovery and reinstall macOS on the main partition. Installing or Reinstalling OS X El Capitan (Only If You If OS X El Capitan came preinstalled on your new Mac, you’ll probably never need this article until you decide to sell it. At that time, it’s a good idea to erase the disk and install a fresh copy of OS X for the next owner. If you’re thinking about reinstalling because something has gone […]
How to reinstall Photos - Apple Community
Next, close Disk Utility and click Reinstall macOS. Follow the installation prompts and allow the procedure to continue until you see the Setup Assistant appear. Press the keys Command+Q to shut How to reinstall MacOS without a Recovery partition Jun 11, 2019
Sep 06, 2019
How to reinstall Photos - Apple Community Feb 19, 2017 How to reinstall macOS via Internet Recovery? The Mac operating system also includes various self-diagnosis and repair tools. Bear in mind, however, that these features might be susceptible to failure. When built-in tools or software-based solutions do not work, the last and most efficient solution is to reinstall the operating system.