I solved this with a terminal command:
sudo gpt destroy /dev/diskx
...where x was the disk I wanted to nuke and reformat, in my case, disk3
Be VERY careful with this that you are choosing the right disk. Run this command in Terminal to see your disk details:
diskutil list
sudo gpt destroy /dev/diskx
...where x was the disk I wanted to nuke and reformat, in my case, disk3
Be VERY careful with this that you are choosing the right disk. Run this command in Terminal to see your disk details:
diskutil list
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