iMAC with Broadcom 14e4-1686 BCM57766 : link status down

[curtis.larsen]

I can confirm that the same hardware version of iMac with different firmware causes this problem. Sorry, I'm sure this isn't big news to anyone.

iMac16,2 with ROM IM162.0206.B00 is able to send DHCP requests.
iMac16,2 with ROM IM162.0207.B20 is unable to send DHCP requests.

The second one had Sierra installed on it, which changed the ROM.

If there are any iPXE developers who want to work on this, I'm available to do as much debugging as you need. I'm a C/C++ programmer, used to command line utilities. I supported Michael Brown a few years ago when he put the first Intel iMac support into iPXE.

Thanks to all of the developers.