10.5 is
Tiger and the formatting is where
Kriss said it is.
Do all your friends have numbers instead of names or just your OS's?!
I find it next to impossible to keep up with the often changing version numbers...they all start with "OS X 10."
So that's five wasted/redundant characters. (Not to mention the confusion of the Roman Numeral "X" which caused a lot of stuttering when the whole OS first came out: "OS Ten 10?!") Then comes the major version number (0, 1, 2, 3, 4, 5, 6, etc. and those equal the cats: Cheetah, Puma, Jaguar, Panther, Tiger, Leopard, Snow Leopard) and the last sub-version can change each month!
No need to use those unless there is a problem directly concerning a particular version, in my humble opinion. And, besides, just do things my way and I'll be much happier.
Why don't you like cats?!
If they're good enough for Steve,...