Most of the 5770 and 5870's will work because they already have support in the OS.
I have a flashed XFX Radeon 4870 and have never had an issue with a software update.
I updated last night to 10.6.5 and played Left4Dead 2 at 2560x1600 4xaa with no problems.
The OS supports the 4870s too. (Apple still sells a retail 4870 for the Mac Pro) However, the kexts in 10.6.4 and 10.6.5 have added something that detects flashed 4870s and then disables them. In 10.6.4 all that was needed was to revert back to the kexts from 10.6.3. But those kexts no longer work with 10.6.5.
is this true or propaganda? im not calling you a liar but would they really be so low as to actively place roadblocks upon people who want to use a video card of their own choice? that does not sound like customer friendly service. 😕
I have a flashed XFX Radeon 4870 and have never had an issue with a software update.
I updated last night to 10.6.5 and played Left4Dead 2 at 2560x1600 4xaa with no problems.
Just installed the 10.6.5 update on my machine and all seems to be working well. All the OpenGL screensavers work super smoothly, there's a shadow on my mouse cursor, and I loaded up a heavy 3D graphics scene which seemed just as agile in the viewport as it always has been so I'm assuming everything is OK.
I don't have Steam installed on my test OS X install but once I've updated my main installation I'll test Portal on it.....I'm pretty sure it should be fine though.
I'm pretty sure that if you have a reference card, there shouldn't be issues but if you had to do some ROM editing / hacking to get your card to work initially, then you may have issues that require the help of netkas / Rominator (on netkas's forums) or Cindori.
Hope this helps.
Gomff - is your card XFX HD-487A-ZDFC ?
Thats very good news for me as I have identical model. I guess I'll be updating tonight after i do cloning via CCC.
I guess it was a good idea to get this specific model 🙂