The Erase, Restore, and Unmount Buttons are only available for non-system internal and external drives and partitions to protect users from affecting macOS.
Case #5: Erase, Restore, Unmount Buttons Are Greyed Out In this case, the Partition button won’t be greyed out but Disk Utility will offer to partition your drive at the expense of erasing your data. See Case #2 for instructions and warnings.Īnother case of “Disk Utility won’t let me partition” is when the drive being partitioned is at full capacity. In this case, you’ll need to format your drive and choose GUID Partition Map as its Scheme. If Disk Utility’s Partition button is greyed out, you might be attempting to partition a drive with the MBR (Master Boot Record) Scheme. If you’re in Disk Utility and you’re unable to partition your hard drive on your Mac, it might be a matter of formatting. Case #4: Partitioning Function is Greyed Out See Case #2 for instructions and warnings. If you want to create a volume on your drive, you’ll need to format it to APFS. If it’s greyed out, that means you’re using a different file system (such as HFS+, exFAT, FAT32, or NTFS) for which the tool is not available. This tool is only available for APFS partitions. The Volume +\- button is a tool that allows users to easily create “volumes” (think of them as the resizable version of partitions) on a drive. The above steps are the gist of it, but you can do other things with Disk Drill like previewing your files (even videos), checking your drive’s health, and more.
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