There are a few reasons why you might want to reinstall macOS (or even Mac OS X). Perhaps your Mac is working erratically and you think that a clean install of the operating system might fix the
Jun 11, 2019 · Once your Mac has booted, try re-running the ‘diskutil list’ Terminal command, to see whether this has resolved the issue. Installing macOS via Internet Recovery. Even if you can’t repair your Mac’s recovery partition, don’t panic! As long as you have an active Internet connection, you can reinstall macOS via Internet Recovery instead. Apple recommends the Command-Option-R option as the only safe way to reinstall a Mac with El Capitan or earlier versions of macOS if you want to be sure your Apple ID doesn’t persist even after Apr 25, 2013 · Since Mac Os X 10.7 was released, all Macintosh computers were sold without an installation disk. There is a rescue partition on the HD or SSD, but what happ Jul 24, 2018 · The problem may be that your Mac is trying to install a version of OS that was last installed on this particular computer. This may be an issue especially if this is a second had, used Mac. Please follow these steps: Start up your Mac in Internet Recovery Mode.
Jun 11, 2019 · Once your Mac has booted, try re-running the ‘diskutil list’ Terminal command, to see whether this has resolved the issue. Installing macOS via Internet Recovery. Even if you can’t repair your Mac’s recovery partition, don’t panic! As long as you have an active Internet connection, you can reinstall macOS via Internet Recovery instead.
Jul 24, 2018 · The problem may be that your Mac is trying to install a version of OS that was last installed on this particular computer. This may be an issue especially if this is a second had, used Mac. Please follow these steps: Start up your Mac in Internet Recovery Mode. If OS X Yosemite came preinstalled on your new Mac, you’ll probably never need this article. In this article, you discover all you need to know to install or reinstall OS X, if you should have to. If you’re thinking about reinstalling because something has gone wrong with your Mac, know that an OS X … Quit out of the Disk Utility app, and this time choose Reinstall OS X and Continue.Follow the instructions that appear on screen, license agreements and all, and choose the hard drive to use (in
It should only take a minute or two for the drive to be erased and reformatted. Now your drive is ready for OS X. Install OS X. There are two ways you can install OS X on to your external hard disk: by reinstalling OS X from the OS X Utilities repair screen or by downloading OS X from the App Store and running the installer.
Method 1: Using Internet Recovery to Reinstall OS X. Turn off your Mac. Hold Command + Option + R and click Power button. Keep holding the keys you see a spinning globe and a message “Stating Internet Recovery. Then, this message will be replaced with the progress bar, wait until the progress bar fills or completes. Sorry Dan, altering the date via terminal was a lost of time. It didn't work for me . What did work was using a bootable usb. In a friend's Mac, download the desired OS installer (High Sierra in my case for my MacBook Pro Late 2011 - google "How to Download a Full macOS High Sierra Installer App") and create the bootable USB, HDD or even SSD with Disk Creator (2 steps very friendly freeware