You might also like
OS X Mavericks' hard drive icon is the latest from Apple that I've seen feature some great, hidden little details.
When you mouseover search results in Apple Maps for Mac, the pins jump on the map to let you know where that result actually is.
When you change your alarm time in Fantastical for Mac (as well as Fantastical for iPhone), a truly fantastic replacement for Apple’s calendar app, it sweats the details between whether an alarm is ‘1 hour’ or ‘2 hours’ before an event. You can get Fantastical in the Mac App Store and App Store