Picked up a mis behaving mid-2011 Mac mini for next to nothing. It is the middle 2.5GHz i5 model that had the discrete AMD 6630M which is failing. Booting any version of OS X newer than Lion results in a KP during boot and trying to do anything that uses 2D/3D acceleration in 10.7 usually ends in a KP. Apparently this is a common failure with this model. The machine will run if you boot in safe mode or delete the AMD graphics kexts. I'm thinking maybe upping the ram and either doing a headless Linux box, or ESXi install as the defective graphics should not affect these. VMWare Fusion can open consoles for VMs running on ESXi. Running VMs without having to use the resources of my home desktop would have its benefits. Not for anything serious, just for fun and testing. I have been checking out the great articles on VirtuallyGheto.com. Seems ESXi 6 installation is pretty straight forward. Curious if anyone might have any pointers. Only other thing I wonder about, is there a way to bypass the 6630M and switch on the HD3000 gfx built into the i5 2520M?