For development (backward testing with older OS versions) I need to install older mac OS versions. Ideally I'd want to go as far back as Snow Leopard.
I have an iMac with retina (model iMac15,1). Before I hunt and dig around for old installation media and experiment, I'd like to find out what is the oldest version that properly supports retina displays (i.e. allows for a properly readable screen)?
The web says Retina was introduced with Macbook Pro 2012 which would be around Mountain Lion.
Expierences (first hand) anyone?