Recovery mode using external monitor /
imac pro 2013 / i7 / GTX780 / High Sierra 10.13.6 /
The screen is dead however the machine runs fine with an external mac monitor running from firewire port / I want to reprovision the machine to run linux (as mac os is not supported anymore(!) /
How do I run recovery mode or select boot mode using the external monitor? The main screen is not working at all / When I try option or opt cmd P+R from USB or wireless keyboard I get nothing on the external screen / S