A1465 、MD711、MD712 choose AIR 11.6

A1466、MD760、MD761 choose AIR 13.3

A1278，MD101 choose PRO 13.3 with optical drive?

A1502、ME865、ME864、ME866、MGX72、MGX82、MGX92 choose PRO 13 retina

A1398、ME294、ME293、ME665、MGXA2、MGXC2 choose PRO 15retina

*** 7 to 10 working days delivery lead time.