I finally got my hands on a refurbished 2012 Mac Mini quad-core i7 with a 1TB hard drive, and was intending to install a new 512GB ssd in one of the vacant bays. I realized today, however, that there are major issues with third-party SSDs since Yosemite came out. I feel like I would need to do some major troubleshooting in order to get the SSD to operate as my boot drive. Have you all encountered this? I am sure this has been discussed in this forum, so I apologize in advance. To hedge against possible SSD issues with the 2012 Mac Mini, I went ahead and ordered a 2014 dual-core 3.0ghz i7 with a 512GB ssd off the refurbished site. When factoring in the cost of the additional SSD and RAM for the 2012, the prices are going to be pretty much identical.