I have a 2012 iMac 21" with the latest Mavericks. I also have a need for a bootable Snow Leopard external drive so I can run Boot Camp with XP. I purchased a Snow Leopard Retail install disk only to find the iMac refuses to boot from it and instead I get a blue screen with Black insert showing unix style error messages. Sorry, but unable to capture these.
I have no doubt I am missing something here, but at a loss for what it is.