![]() The backup disk is not in Mac OS Extended (Journaled_ format, which is required.”Įxactly what is a Mac user to do to properly format a Windows-formatted external hard drive? > Operation failed…Īs soon as that error message appeared, I got a similar error message from Time Machine saying “Time Machine couldn’t complete the backup to ‘My Book’. The details read: Unmounting disk > Couldn’t unmount disk. Here’s what it said: Erasing “My Book” and Creating “My Book Backups” Erase process has failed. (Unfortunately, WD apparently doesn’t permit us to attach a screenshot to these posts sorry for my description of what was revealed). Here’s what I did: Using Disk Utility, I changed the name from “My Book” to “My Boob Backups” I immediately got an error message. Wish the web page suggested which option to select it simply states “Select” without suggesting what each selection enables. I chose “Max Extended Journaled” for the Erase process, however, maybe I should have picked a different format option. It doesn’t tell us which option in the drop-down format field to choose. The instructions on the WD “Format for Mac” page, when followed, didn’t work. If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.I bought and received a new My Book. Secure erase options are available only for some types of storage devices. ![]() (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. ![]() If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to erase-it’s at the top of the hierarchy.Ĭlick the Format pop-up menu, then choose a file system format. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. In the sidebar, select the storage device you want to erase, then click the Erase button. ![]() If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Note: If you want to get your Mac ready to trade in, sell, or give away, and your computer is a Mac with Apple silicon or an Intel-based Mac with an Apple T2 Security Chip, use Erase Assistant. ![]()
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