Judging from the anti-Mac comments, it sounds like PostgreSQL is kind of a Linux/Microsoft thing. If PostgreSQL isn't compatible with Apple, then that's definitely the end of the line. I used M$ for years and would never go back. I used to be a passionate Linux supporter - largely because I wanted to see it compete with Microsoft - but the Linux community never could understand the concept of "user friendly."
I get far more service from my Mac than I ever got from M$, and I won't waste my time with any software that isn't Mac-compatible.