I may just not use whatever it is that has bugs in OSX, but I've got a 2009 Mac Book Pro that I've been using since it was new, and I always upgrade the OS afte

I may just not use whatever it is that has bugs in OSX, but I've got a 2009 Mac Book Pro that I've been using since it was new, and I always upgrade the OS after a month or so from release. I've only ever noticed a bug in Lion or Mountain Lion (don't recall which) where time machine would get borked if I put the computer to sleep when it was in the middle of a backup. That was super annoying, but it was fixed eventually. I've never had any issues with wifi or graphics or whatever. I suspect these issues come about from hardware changes and the related drivers in the various models. Windows has the exact same problem, exacerbated by the freedom users have to mix and match hardware. My work computer running windows 7 would crash once or twice a week, always due to video driver (or the underlying hardware). While Apple's ecosystem is limited, they actually have a rather large diversity of hardware to support now, and I'm sure that is the source of many issues. Makes me afraid to upgrade actually since my computer works so well.