Looking for legacy software for OSX

I just purchased a used Apple Mac Pro 4,1 in which I found a pair of Blackmagic Intensity Pro PCIe cards. There are no breakout cables, just the cards. From what I understand, as long as I don't mind limiting myself to HDMI, I don't need the breakout cable. Good! The problem is that I can't find the software (neither the drivers nor the applications). I contacted Blackmagic support and was basically told that it would be too much of a hassle for them to hunt down that old sofware so, I was SOL. I am wondering if there is someone in the community who would be good enough to point me to a location where I might legally obtain this software. From what I understand, when said software was available, it was free and didn't even require that the downloading party register. Be aware that I am not a broadcast professional... just a retired schmuck who found an interesting gadget that he would like to play with. Greetings from the Great White North, eh.

Hi Richard,

It is just on the website for download. Nothing special required! When you get prompted for registering just look at the end of that fill out form and you will see Download Only.
For more info check >>
Frequently Asked Questions - Capture, Playbackand Stream > Point 4.01