Greetings!

My question is as follows:

If I were to write a driver for, let's say, a graphics card using Open Darwin / Darwin, would this driver by compatible with Mac OS X (using the same kernel, that is...)?

Thanks!

I never looked specific on the darwin project, but I believe IOkit is belonging to Darwin and should therefore also mean it is the same as Mac OS X. But if the drivers also communicate with other non-darwin frameworks then it will be different.