Just finished updating the patch. I do not believe apple made much if any changes to the 4870 drivers. So all I had to do was allow the old patch to install under 10.6.6. Once again, if you are not able to get your 4890 operating with netkas patch try combining it with this one to see if you can get everything back to normal. Just install this one before you install netkas. Here it is. Good luck. And please feel free to post successes or issues.