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Recently I created a bootable Mojave installer on a USB 3.0 memory stick which I used to install Mojave on both my computers.
I now want to erase the memory stick but Disk Utility fails every time, reporting that it either cannot open or unmount the drive.
I have tried selecting "Apple UDIF" as shown in the screenshot and also "InstallESD"
I assume it is possible to erase it so where am I going wrong?
You are trying to erase the wrong thing. You need to select the "Kingston Data Traveler" and erase that.
You are trying to erase the wrong thing. You need to select the "Kingston Data Traveler" and erase that.
+1 Good Catch.
OOOPS! I must be going blind.
Thanks very much.
I was doing it in a bit of a rush but it's anyone's guess as to how long it would have taken me to spot it.
Can't erase bootable USB Mojave installer!
