COULD NOT UNMOUNT DISK MACBOOK AIR MAC
Secure erase options are available only for some types of storage devices. This can be achieved by booting your Mac from an external hard drive or macOS Recovery. (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. In the box labeled Get Info, locate the Sharing & Permissions section and click on it.
Click the Unmount button in the toolbar or beside the disk set name. To do this, follow these steps: On the desktop, locate the icon representing the drive, right-click it, and pick the Get Info option. In the Disk Utility app on your Mac, select the disk set that you want to unmount in the sidebar. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. I recommend you first check and configure the drive’s permissions. 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. If, instead, I select the physical device instead of just the volume then First Aid runs just fine, I get no errors. Restoring the original state found as mounted. 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. Running First Aid on LaCieDrive (disk4s2) Repairing file system.
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