Firmware update on late 2012 Mac Mini w/o DVD drive

No.  All the USB posts are USB 3.  I went out and bough a Microsoft keyboard.  That was not recognized either.

I’m pretty sure that the problem is the USB3 controller.

I don’t know if you know this, but for the record Crucial has a similar method for updating their SSD firmware.  They have you create a bootable CD using a small Linux system.  Their boot CD works on my Mac Mini.

I’m pretty sure that you could make this work.  If you send me an email off the forum perhaps I could do some beta testing for you.

For now I’m just going to wait…