Good news for Apple T2 Mac owners, joshua stein (jcs@) has committed a fix to #OpenBSD -current for the T2 NVMe controller found on later Intel machines.

jcs@ modified src/sys/*: use I/O submission queue entry size reported by controller

On the Apple T2 NVMe, 128-byte submission queue entries on I/O queues are required instead of the standard 64 bytes.

ok jmatthew

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This gets NVMe working on the 2018 Mac Mini.