Reinstall from macOS Recovery
May 14, 2020 To recover erased or deleted data from the Mac external storage drive, go through the following steps: When the software completes the recovery task, go to the specified save destination to verify the recovered data. Copy the data back to the external. Jun 03, 2020 Restore all your files. Make sure that your Time Machine backup disk is connected and turned on. If your backup disk isn't available, keep going: You might be able to. Turn on your Mac, then immediately press and hold Command (⌘)-R to start up from macOS Recovery. Summary: This is a tutorial to repair corrupted, unreadable and unmountable external hard drives on Mac computers, but in case of losing data accidentally, you can recover your files from the external hard drive with iBoysoft Mac Data Recovery at first.
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
1. Start up from macOS Recovery
Remember to format your new drive with disk utility using the mac journaled file system. Make sure your external drive is powered and on before you boot, then press option while booting. Select time machine, format the new drive, and restore. Apr 23, 2019 If you have backed up Mac with Time Machine, you can enter into Recovery mode to restore MacBook from external hard drive. Well, some unsaved and not backed up files cannot be recovered completely while restoring from a Time Machine backup. Jan 10, 2020 Up to50%cash back If your Mac fails to boot from an external drive even though you have properly installed the OS X installer, then maybe your disk is damaged. You should open Disk Utility and ask permission to repair disk.
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
The OS typically creates a list of everything that's backed up so that new files can be incrementally backed up. In the first case, it could be that Time Machine's processes that allow ongoing backups to be executed in the shortest time possible are the very cause of the issue. That's why most macOS users who have an external hard drive connected and Time Machine running in the background hardly notice it. Macos backup iphone. This inventory-based system saves time because once it's done, Time Machine doesn't need to do a full backup every time, which could seriously eat up your resources. What could the problem be, and why is Time Machine apparently stuck while showing this message?
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
- 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 is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but 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.
![Drive Drive](/uploads/1/2/6/0/126080335/388589802.jpg)
Restore Mac Os From External Hard Drive Windows 7
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
- If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
- If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
- If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
- You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
- Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.