I finally got it working by installing Leopard graphics update on a 10.5.2 machine then installing all updates from Apple except OSX 10.5.6. I swear I did this before and it didnt work. But now it does then after install I installed 2 more apple updates except 10.5.6 OSX. I am about to install Kona Card. The issue I had was the 0 Vram which I have seen a bunch of times on different cards erroneosly. I want to know how to workaround this check somehow as it seems to pop up more then it should. If the K?ona installfails I will repost but I dont expect this is a related issue, although I need to make sure of which version of AJA software as 2.8 just added pro res HD capture but might not work with 10.5.2, When I upgrade to 10.5.3 I get the same 0Vram error so mu upgrade path is blocked for now.