Jaimie

I too am having no luck installing Yosemite on an Optiplex 755 Optiplex 755 Core 2 Quad Q9400 5Gb RAM GeForce 210 1Gb I'm running 10.7.5 with the occasional crash at boot When I try to install Yosemite, it crashes before I can choose an install location. I think it has to do with AHCI.