NOTE: before you read this, please note that I'm discussing only the choice names for the OS. I'm not talking about functionality, stability or even usability of the different releases. And yes, I am falling in love with OS X Mountain Lion, and can't wait for its release! After a decade of Mac OS X, here's the list of all releases: 10.0 - Cheetah 10.1 - Puma 10.2 - Jaguar 10.3 - Panther 10.4 - Tiger 10.5 - Leopard 10.6 - Snow Leopard 10.7 - Lion 10.8 - Mountain Lion From this list you can obviously see that Apple was naming the OS based on 'big cats' names. (which is something that 99% of users in this forum already know). But the interesting thing is that if you look at the list of big cats on wikipedia: You'll see that three of our beloved "Mac big cats", (Puma, Panther and Mountain Lion), are not included in the list. After further research, I wanted to check out the names that Apple still hasn't used yet: cougar and clouded leopard. The name 'clouded leopard' could've been used as another update to leopard/snow leopard, but it would've sounded cheesy after two consecutive releases with the name 'leopard'. That leaves the cougar. If you go to the wikipedia page you'll find this: Which means that cougar, panther, puma and mountain lion are basically the same animal. And that animal is not that big in size. So, a mountain lion is actually a smaller animal than a lion. It's like they're downgrading the king of the jungle to a smaller cat. Giving three different major OS releases names of the same animal is somehow a weird move from Apple, a company who is known for its extreme attention to the smallest details. After Mountain Lion, if Apple still wants to release 10.9, they are going to have to use either Cougar or Catamount, which is still the same animal as panther, puma and mountain lion. There are no more 'big cats' names to use except maybe mountain cat (which does not sound interesting at all), and clouded leopard, which I'm 100% sure they won't use due to reasons explained earlier in this post. One more thing... when Apple is finally done with OS X, and wants to move on to OS XI, what naming scheme do you think they'll adopt? perhaps canines? birds? sharks? or even dropping the whole animal theme, and go with stars, galaxies and maybe natural phenomena. OS XI Volcano, anyone? Let me hear your thoughts!