Hi Guys We need to start testing Yosemite but don't have what I'd call an extra machine, but we do have a portable that, while used in the field, can become something less than a production machine (though it will have to run networked iTunes media on site and particularly in client sites). Is Yosemite 3 pretty reliable/stable and able to run most software? We'd be putting it on a 2012 MBP Retina if that's any help. Also considering installing Yosemite Beta 3 on a mid 2010 Mac Mini Media Server. Yes? No?