Hot answers tagged disk-utility
You cannot erase the currently-running volume. Shut the computer down, restart while holding the option key, and choose the Recovery HD. Find Disk Utility in the menus and you will now be able to erase your internal storage.
I have found that using Recovery Partition Creator 3.8 works for me. I use Carbon Copy Cloner to clone the other partitions but Recovery Partition Creator for the Recovery HD partition. It appears to handle the issue of removing partitions after the Recovery HD partition properly, and also works if you have left free space after the volume that the ...
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