I’m unable to upgrade firmware on mac mini without cd-rom.
I trying to burn iso image to usb stick via disk utility but getting folowwing error:
“Could not validate source - Invalid argument”
Can you provide correct iso or dmg that can be used with mac disk utility because seems i haven’t a way to upgrade ssd firmware now?
P.S. i tried unetbootin on win and mac, tried to copy iso content with dd in terminal but mac still can’t see my usb stick on load.