Start up from macOS Recovery
If you are seeing a dark grey screen with a loading bar stuck at 75 percent, or a spinning gear just underneath the Apple Logo then it is most likely that your Mac is having trouble loading kexts, drivers, or other system processes. The M1 chip brings superfast unified memory to MacBook Air. This single pool of high-bandwidth, low-latency memory allows apps to share data between the CPU, GPU, and Neural Engine efficiently — so everything you do is fast and fluid. Oct 25, 2020 Go into System Preferences General and set your Mac to use dark appearance. Note the application that you want to change the appearance of will have to restart before you see the changes. This is currently handled by Gray but be sure to not have any unsaved changes before you start tailoring your macOS experience. Jul 12, 2020 Mac OS X Internet Recovery.jpg Press Command + R button during startup and you will be taken to Recovery Mode, wait until you see a gray screen with the apple logo. (Note: this option is available for Macs that were shipped with Mac OS X Lion or later. Some Mac’s may require EFI BootROM update for this command/feature).
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
Apple silicon
Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
Intel processor
Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.
If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
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Follow these guidelines during installation:
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
After installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
- On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
- If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.
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You can also use these methods to install macOS, if the macOS is compatible with your Mac:
Mac Os Catalina
- Use the App Store to download and install the latest macOS.
- Use the App Store or a web browser to download and install an earlier macOS.
- Use a USB flash drive or other secondary volume to create a bootable installer.