Would I be able to use my iMac as a monitor for a 1st/2nd generation Nintendo/Sega console? (i.e. NES/SNES/Master System/Mega Drive) I had a quick google search but couldn't find any information on the subject. I've seen lots of questions about Xbox 360's but nothing about older consoles. Wondered if anyone had any experience in this or could point me in the right direction?