When the new owner starts up the Mac, they can use their own information to complete the setup process. If you’re selling, trading in or giving away your Mac, close the setup assistant without completing the setup process, then click Shut Down. When installation has completed, your Mac may start up to a setup assistant.Your Mac may restart and show a progress bar several times, and the screen may be empty for minutes at a time. Allow installation to complete without putting your Mac to sleep or closing its lid.If the installer can't see your disk, or it says that it can't install on your computer or volume, you may need to erase your disk first.If the installer offers the choice between installing on Macintosh HD or Macintosh HD – Data, choose Macintosh HD.If the installer asks to unlock your disk, enter the password that you use to log in to your Mac.Click Continue, then follow the onscreen instructions.When you see a window with the option to reinstall macOS, this means your Mac has started up from Recovery. Then click Next and enter that user’s administrator password, which is the password they use to log in to the Mac. If you’re asked to select a user you know the password for, select the appropriate user.To select a Wi-Fi network, use the Wi-Fi menu in the top right-hand corner of the screen. You may be asked to select a Wi-Fi network or attach a network cable.Keep holding the keys until you see an Apple logo or spinning globe.Shift-Option-Command-R: when you press and hold these four keys during the startup process, macOS Recovery may offer the macOS that came with your Mac, or the closest version still available.Option-Command-R: when you press and hold these three keys during the startup process, macOS Recovery may offer the latest macOS that is compatible with your Mac. The macOS High Sierra 10.13.6 Update adds AirPlay 2 multiroom audio support for iTunes and improves the stability and security of your Mac.Command-R: when you press and hold these two keys during the startup process, macOS Recovery will offer the current version of the most recently installed macOS.If none of them work, review the guidelines for using startup key combinations. Immediately after releasing the power button, press and hold one of these key combinations.Press and release the power button to turn on your Mac.When it is done, backup the disk image to your online/local backup.If you're not using a Mac with Apple silicon, you're using an Intel-based Mac. Select Save the home folder in a disk image and Click Delete User. Access System Preferences→Users & Groups, and Clock minus button on the bottom in the left panel. First of all, create a new admin account and login with this account. There is an easy way to backup each user account on your Mac. If you have more than one user on your Mac, and you’re only interested in backing up your own data, just go one level deeper and select your user account from within the Users folder. Each user account contains your Desktop files, documents, downloads, videos, music, and pictures. This will back up your user account, along with any other accounts on the Mac, plus any shared data. When choosing what to backup manually, most importantly look at the Users folder, located by default at Macintosh HD/Users/. ![]() ![]() Each command assumes that the installer is in your Applications folder, and MyVolume is. ![]() Type or paste one of the commands below into Terminal, then press Return to enter the command. macOS High Sierra also refines the features and apps you use every day. New technologies at the heart of the system make your Mac more reliable, capable, and responsive and lay the foundation for future innovations. Open Terminal, which is in the Utilities folder of your Applications folder. Download macOS High Sierra for macOS 10.8 or later and enjoy it on your Mac. So, If you skip this step, you won’t be able to recover your data if something goes wrong. Use Terminal to create the bootable installer. Note: A clean install of macOS Sierra on the startup drive completely erases all data on that drive including all your files (documents, music, movies, pictures, and even apps).
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