The inevitable Mac OS name change

Today I was thinking , what happens when Apple runs out of cat names to name their operating systems? So far they have used the following names:

Cheetah, Puma, Jaguar, Panther,  Tiger, Leopard,  Snow Leopard, Lion and Mountain Lion.

Im no cat expert but Im pretty sure that Apple is running out of cat names. According to my calculations lynx, cougar, bobcat…. liger? ( don’t pull a napeoleon dynamite on me) are the only names left. So whats next ? Im thinking shark names. They still maintain a special ora to the operating system. In reality if Apple were to use the last four cat names they would not have  to worry about changing animals for five to six years. Im wondering what your guess are, comment below.