If you were wondering why the T2 chip in the new iMac Pro could force a DFU restore in extreme cases (like power failure during an update), that’s because the chip plays an important security role in the high-end machine …

MacWorld has an interesting look at the surprising number of tasks carried out by the chip.

But it’s the security functionality that causes the chip to lock down the machine if something doesn’t look right.

A failed update could cause the T2 to see macOS as compromised, refusing to permit a boot-up attempt.

It’s also the reason that the SSD will be unreadable if removed from the machine.

If you really dislike the slight risk of the chip bricking your machine until it can be restored by another one, you can switch off the protection.

The whole piece is an interesting read.

Photo: iFixit