Hello all! Long time reader, first time writer. Been Googling and reading and reading, and my brain is mush. I kindly and with great appreciation ask for help and direct answers. I inherited a Mac Pro 1,1. 2x 2.66 for four cores, 500GB System Drive, 3 2TB Scratch Drives, 12GB RAM, X1900 graphics card, FCS 3 discs with serial included. Very useful as a B machine for editing (Primary is an Avid & Adobe PC). Was given to me clean, so I downloaded a 10.7.4 image, installed, all was well. I followed all instructions I could find for installing 10.8.3, 10.9.4, 10.10.1, both official and with Chameleon, and no luck on ANY of it. Followed the instructions for every single one - twice - and could not get any of it to work. So, went back to Lion. Did the install of Lion, installed FCP, had the comp search for updates . . . and no 10.7.5 came up? Weird. Anywho - going to do the X5355 upgrade, and would like to upgrade the graphics card so I can get the tower to utilize and HDMI TV for editing (trying to use as much equipment I have around as possible to make this as inexpensive as possible). If I can get 10.7.5 installed, would an EVGA 01G-P4-2650-RX GeForce GTX 650 work? It is the least expensive Nvidia card I can find that has an HDMI out (and I don't care about audio over HDMI, just video). Process - would I update to 10.7.5, download Nvidia driver for 10.7.5, install, shut down, unplug the X1900, install the Nvidia in the bottom slot where the X1900 was, and reboot and pray the HDMI works? With the available TV / Monitor I have, DVI is not an option - needs to be VGA or HDMI. Additionally - would also like to upgrade the system drive to a SSD (250GB will suffice), and maybe swap the SuperDrive to a BluRay burner (have a copy of Toast for BluRay burning), which I believe will involve using a PATA to SATA adapter, unless I install it in the spare bay which has SATA running to it already? Basically, processors + card + SSD + Blu-Ray = Anything I am not thinking, aside from where to find a adapter for the Mac Pro sleds to install the SSD? Don't need the whole heatsink thing, just an adapter to the sled.