- Apple Footer.Listed pricing is Maximum Retail Price (inclusive of all taxes) Screen size is measured diagonally. 1TB = 1 trillion bytes; actual formatted capacity less. Testing conducted by Apple in October 2020 using pre-production MacBook Air systems with Apple M1 chip and 8-core GPU, configured with 8GB of RAM and 512GB SSD. The Apple TV app movie playback test measures battery life.
- Shop for mac os x at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up.
Page 25 of 33 Prev 1 All this time I store my operating system on SSD and big files in hard disk drive. System 3 is an Intel Xeon E5607, and the SSD is an OCZ AGILITY3 120GB. 8 TiB, 016 bytes, sectors Disk model: Samsung SSD 860 Units: sectors of 1. 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O.
Open Accessibility Options
Press these keys together: Option (⌥), Command (⌘), and F5. On notebook computers with a Touch Bar, you might need to press the Fn (Function) key as well.
On notebook computers with Touch ID, triple-press Touch ID. (If you press and hold the Command key while doing this, VoiceOver turns on or off.)
To close Accessibility Options, click Done or click anywhere outside of the window.
Change the shortcuts in Accessibility Options
To change the shortcuts that appear in Accessibility Options, choose Apple menu > System Preferences, then click Accessibility. Select Shortcut in the sidebar, then use the checkboxes to turn shortcuts on or off.
Learn more
- You can ask Siri to perform many accessibility functions. For example, ask Siri to ”turn VoiceOver on” or ”turn Zoom on.”
- Learn about other Mac accessibility shortcuts.
Start up from macOS Recovery
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
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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.
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Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
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.
You can also use these methods to install macOS, if the macOS is compatible with your Mac:
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- 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.