(MacOS X is a curious blend of elegance (Cocoa and Interface Builder, and the rendering model) and awkwardness (mostly to do with how MacOS was grafted onto NeXTSTEP/UNIX; the fact that the two layers of the system have different character formats and concepts of timezones, for example, and that devices such as sound are not represented in the POSIX layer (without linking to Carbon libraries, which is cheating), and the fact that Classic applications run essentially with root privilege, bypassing UNIX file protections entirely, makes it look a bit like P.T. Barnum's Fijian Mermaid in places. And then there's the still immature UI. But other than that, it's a nice OS.)
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