OS X is great, I just wish Apple stopped fucking with it and trying to make everything so Playskool.
I don't really mind having to resort to BSD tools to get my shit done, but when I'm forced to hack shell scripts just because Apple thought putting a IP and Subnet inputbox on the Internet Sharing dialog would "confuse the average user" pisses me off a lot.
God fucking dammit, Apple, "Advanced" buttons won't hurt anyone. The "average user" isn't going to click there and change numbers he doesn't understand, and if he does, fuck him. Stop making me waste my time, one-size-fits-all just leads to shit that "Just doesn't work." You make excellent tools and then make them inflexible on purpose so they ultimately become useless to anyone over the age of 10.
Look at Time Machine. That stupid thing is so unobtrusive and easy to set up that it actually got me to make backups, something I never did for non-vital data. But then I had to repartition my backup disk because Time Machine will eat up your entire backup partition and there's no way to put a limit. And this is not a technical limitation, they fucking crippled it because they felt that they knew better than you. Seriously, what's the point of making the user jump through hoops and hurdles just to perform basic changes?
I hate their face so much. The fact they make the best Unix flavor available for the desktop and then do so much shit to it (or neglect it to work on hipster crap like the iPhone) just makes me want to break things.