Whichever method you choose, it will take anywhere from 15 to 30+ minutes to install OS X onto your external hard drive. Run Mac OS X From an External Hard Drive. While OS X is installing, your computer will restart a couple of times. Note that when it finally boots into OS X, that is the version running off your external drive.
Buy New Hard Drive
- If you're in Mac OS X 10.7 and later, you'll need to select the 'Reinstall Mac OS X' option from the Utilities screen. In earlier OS versions, quitting Disk Utility will take you back to the installer. Follow the steps as they are presented, making sure to select the new drive (the one you just formatted in the previous step) as the install.
- Sep 06, 2019 The simplest way to install macOS or OS X on a new hard drive is by using Internet Recovery Mode. This mode is only available on Apple computers made after 2009 that were running OS X Lion or later. If your Mac is from before 2009 or never had OS X Lion, click here to jump to the next section.
Start up from macOS Recovery
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps: Do i have to pay for microsoft word on mac.
Install New Mac Os X On New Hard Drive
- Apple silicon: turn on your Mac and continue to press and hold the power button until you see the startup options window, which includes a gear icon labelled Options. Select Options, then click Continue.
- Intel processor: make sure your Mac has a connection to the Internet. Then turn on your Mac and press and hold Command (⌘)-R immediately until you see an Apple logo or another image.
If you're asked to select a user you know the password for, select the user, click Next and enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery and then click Continue and follow the installer's instructions.
Follow these guidelines during installation:
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac may restart and show a progress bar several times, and the screen may be empty for minutes at a time.
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer can't see your disk or notifies you that it can't install macOS on your computer or volume, you may need to erase your disk first.
- If the installer is for a different version of macOS to what you expected, find out about other installation options, below.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD – Data, choose Macintosh HD.
When the installation is complete, your Mac may 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 the setup process.
Other macOS installation options
By default, macOS Recovery installs the latest macOS that was previously installed on your Mac.* You can get other macOS versions using one of these methods:
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps: Do i have to pay for microsoft word on mac.
Install New Mac Os X On New Hard Drive
- Apple silicon: turn on your Mac and continue to press and hold the power button until you see the startup options window, which includes a gear icon labelled Options. Select Options, then click Continue.
- Intel processor: make sure your Mac has a connection to the Internet. Then turn on your Mac and press and hold Command (⌘)-R immediately until you see an Apple logo or another image.
If you're asked to select a user you know the password for, select the user, click Next and enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery and then click Continue and follow the installer's instructions.
Follow these guidelines during installation:
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac may restart and show a progress bar several times, and the screen may be empty for minutes at a time.
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer can't see your disk or notifies you that it can't install macOS on your computer or volume, you may need to erase your disk first.
- If the installer is for a different version of macOS to what you expected, find out about other installation options, below.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD – Data, choose Macintosh HD.
When the installation is complete, your Mac may 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 the setup process.
Other macOS installation options
By default, macOS Recovery installs the latest macOS that was previously installed on your Mac.* You can get other macOS versions using one of these methods:
- On an Intel-based Mac, you can use Option-Command-R at startup to upgrade to the latest macOS that is compatible with your Mac. Exceptions:
- If macOS Sierra 10.12.4 or later was never previously installed, you will receive the macOS that came with your Mac, or the closest version still available.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, you will receive the latest macOS that was installed on your Mac.
- On an Intel-based Mac that used macOS Sierra 10.12.4 or later previously, you can use Shift-Option-Command-R at startup to install the macOS that came with your Mac, or the closest version still available.
- Reinstall macOS from the App Store instead of using macOS Recovery. If you can't install the latest macOS, you may be able to install an earlier macOS.
- Create a bootable installerand then use it to install macOS on your Mac or another Mac.
* If you've just had your Mac logic board replaced during a repair, macOS Recovery may only offer the latest macOS compatible with your Mac. If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery may only offer the macOS that came with your Mac, or the closest version still available.
