How do I remove an EFI boot partition?
I have an old 3.5” internal SATA drive — a 4 terabyte one — I’m trying to sell on: as I know longer have a need for it.
I wiped it, securely, in a dock connected to my iMac*: whilst it was connected in an internal bay.
Then, as it refused to mount, after the wipe?
I put it into an internal bay in my old MacPro — running 10.7.5 — and wiped it there.
It showed up, after the wipe.
However, when I took it to the shop, it showed up as a 200mb or so EFI BOOT partition.
How do I remove that partition?
* Running 10.14.5