Press "Command-Q" when the scan completes, and then press "Command-Q" again to quit the Mac OS X installer. Select the new backup from the device pane when the process completes, select "Images," and then click "Scan Image for Restore." Wait for the scan to run. (Your Mac’s built-in OS X Recovery features include Disk Utility, but. It usually takes about a minute for 1 GB of data to be imaged to the external hard drive. Making a backup of Mac OS to an external hard drive is essential for every individual using Apple computers. A clone also comes in handy for troubleshooting, because you can use it to run third-party utilities on your ailing drive. When prompted, enter a password to protect the image.Ĭlick the "Save" button and enter your administrator password. Select "128-bit" or "256-bit AES" from the encryption menu to add security to the backup. Choose the Time Machine drive thats connected to your Mac as the Restore. Click the "New image" button, and then give the new image a name you'll remember easily. Downgrade from Big Sur to Mojave I just purchased a 27 iMac with the 10. Select the disk you connected to the computer from the source pane and click "Verify Disk" to check for hard drive problems.Ĭlick the "Repair Disk" button to repair the hard disk if an issue is found. Select your language and choose "Disk Utilities" from the "Utilities" menu. Hold the "C" key to start the system from the disc. Earlier OS X versions have slightly different interface. Insert your Mac OS X disc into the CD/DVD-ROM and restart your computer. Here is how to back up your Mac: We are using OS X El Capitan. Connect an external hard drive to the computer using the USB cable and wait for the drive's icon to appear on the desktop.
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