This seems to be mostly about A/V. When I was doing a lot of MacOSX kernel / driver work 8-10 years ago and keeping up with all the darwin lists, we'd get tons

This seems to be mostly about A/V. When I was doing a lot of MacOSX kernel / driver work 8-10 years ago and keeping up with all the darwin lists, we'd get tons of questions from A/V devs porting their software from Windows to Mac. There were all kinds of bad questions. The worst one I remember is somebody asking why they were not allowed to hold a kernel mutex across notifying a kernel-space A/V deamon & waiting for it to respond (deadlock?). After seeing multiple questions like this from these folks, I resolved to never run a 3rd party A/V suite again, and have run nothing but vendor provided A/V.