![]() ![]() Updated December 2019: Everything is up to date through macOS Catalina. If you have any more questions about reinstalling macOS on your Mac, let us know in the comments. How to set up and customize your Mac from scratch Questions? If you're starting from scratch, you'll need to set up your Mac from scratch. sudo nvram 'recovery-boot-modeunused' sudo reboot. Your Mac will now go through the normal macOS installation process, eventually restarting. From the VM settings -> Startup Disk -> Select the new hard disk from Step 1 and reboot. And you can change the formatting of drives. That means you can also wipe hard drives and SSDs. All the same functions you usually find in Disk Utility are there. Navigate to /Volumes/ (my OS drive name)/. Create a bootable recovery disk using the instructions here on the new hard disk. In Recovery mode, you can use Disk Utility to scan and fix disk drives, just as you would when booted into macOS. I am able to boot into Recovery Mode, and my intent was to rescue the important data sitting in /Users/ (my username), but to my surprise, the entire /Users/ folder is just not there when I try to access it via Terminal. Enter your Apple ID and password if you're asked to, though you might not be. Download the Install Big Sur application from the App Store.Click on the drive on which you wish to install macOS.How to reinstall macOS while in Recovery mode If you're running macOS High Sierra or later on a Mac with an SSD, your choices will be some form of APFS. ![]() ![]() Click on the format you want to use for your drive.Click on your startup disk in the Disk Utility sidebar.If you still need help, contact Apple Support. When the Mac restarts, hold the Command + R keys together until the. If you see a black screen or some other screen during startup, learn what to do if your Mac doesn't start up all the way. Start with clicking on the Apple menu and choose the Restart option or Power on your Mac. Start up from another disk or volume, if available, or use a bootable installer to reinstall macOS.Try again later, because the issue might be temporary.Your network configuration might not allow the internet access that macOS Recovery needs. See also Use macOS Recovery on a Mac with Apple silicon Erase your Mac. On an Intel Mac, boot the Mac and hold a key like Shift, Command+R, Option, D, Command+S, T, or other keys to access a variety of boot options. Shut down your Mac: Choose Apple menu > Shut Down. Key Takeaways On a modern Mac with a chip like the M1 or M2, power off the Mac and then hold down the power button until you see a message saying startup options are loading. Choose a different startup disk before restarting your Mac: Choose Apple menu > Startup Disk, select a startup disk, then click Restart. Connect to the internet from a different Wi-Fi or Ethernet network. 6 Answers Sorted by: 49 You can do that using the following command: sudo nvram 'recovery-boot-modeunused' sudo reboot This sets a firmware variable in nvram indicating that you want to start in Recovery mode on the next boot, and then reboots the machine. Restart your Mac: Choose Apple menu > Restart.Connect to the internet using Ethernet instead of Wi-Fi, or vice versa.Press Command-R at startup to try using the built-in Recovery system instead of internet Recovery.Make sure that your Mac can connect to the internet. If you're not asked to choose a Wi-Fi network during startup, choose a network from the Wi-Fi menu, if available.In that case, one of these solutions might help: If you see a globe with a warning symbol (exclamation point), the attempt to start up from macOS Recovery over the internet was unsuccessful: When your Mac begins to start up from macOS Recovery over the internet, it shows a spinning globe instead of an Apple logo during startup: If none of the key combinations work, review the guidelines for startup key combinations. If it doesn't, press and hold Option-Command-R or Shift-Option-Command-R during startup. When an Intel-based Mac can't start up from its built-in Recovery system, it automatically tries to start up from macOS Recovery over the internet. ![]()
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