Hello. I am new to the Mac world. I bought a refurbished MacPro 3,1 to use for recording demos and such. I recently purchased a Samsung 840EVO SSD and am trying to install it. I realized it was not gonna fit as is so I bought a 2.5-3.5 mounting kit from a local computer store and can't seem to get that working either. If anyone has any ideas of how to get this installed, I would really appreciate. Again I am brand new to the Mac world and apologize if this is a really dumb question. Thank you.