iCloud Keychain limited by country. Truly WTF?!
This was the single biggest thing I was looking forward to on Mavericks. The first thing I did after installing was to go setup iCloud Keychain only to be literally slapped in the face by Apple. Pakistan is not listed as one of the countries where you have to enter a phone number. This is a truly WTF moment, seriously. I've never seen Pakistan not listed in any such list. Google 2-step verification has it, Twitter has it, but Apple doesn't.