Gigabyte P55A-UD4P - Boots to Installer, No Mouse/Keyboard
Trying to update from "Snow Leopard" 10.6.8 --> "Mavericks" 10.9
So far it's a no-go. Tried boot flags individually, together, none, safe boot - no joy. :/
System: Gigabyte-P55A-UD4P, Intel Core i5 (Socket 1156), 4GB 1066 MHz DDR3...