Apologies for the geeky posting - have gone a bit mad on this one.... Anyone know how to modify nvdarwin, or its successor corevidia, to allow the use of Nvidia GTX 275, 285 cards (for PCs, not the new thing due in June), the latter with either 1G or 2G on board, on an 08/09 Mac Pro? I realize this is a bit obscure, but there is some evidence on various forums that the 260/280 can be got up under OS X, but nvdarwin and corevidia 1.0 (March 09 version) both seem to have hard-wired refs to the PCI IDs for both these cards in both the plist AND the binary code, and furthermore the settings only go up to 1G in the install options. The use of a 275, 285 (or a 295) and/or with more than 1G memory requires some mods? My card also seems to have a different NVCAP from those in the corevidia/nvdarwin defaults. I have tried various combinations of the following (a) 40 or 80 in the memory area of the plist; (b) adding the 0x05e3 pci id code of my 285 to the plist (either adding it to the existing long list or having only this instead of the long list) (c) original NVCAP or custom NVCAP I start to boot fine with a standard 8800GT in the lower slot on an 08 Mac Pro with the 285 in the slot above. Then all I get is kernel panics. All is well under bootcamp+XP. If anyone knows the mods for these newer cards, or can persuade the author of corevidia to update to add new IDs and memory I will be very happy. Responders may assume I have feasible OS.