MacBook Air 13" 2015 1,6 Ghz 2015 A1466 EMC 2925 MacBookAir7,2. MacBook Air 13" 2015 2,2 Ghz 2015 A1466 EMC 2925 MacBookAir7,2. MacBook Air 13" 2017 1,8 Ghz 2017 A1466 EMC 3178 MacBookAir7,2. MacBook Air 13" 2017 2,2 Ghz 2017 A1466 EMC 3178 MacBookAir7,2.