MacBook Air 11" Early 2015 Repairability Score: 4 out of 10 (10 is easiest to repair).

Once you get past the outer case, all the major components are fairly easy to access for replacement.

The outer case is held on with Apple's proprietary Pentalobe screws, so you'll need the right screwdriver to get inside.

Just like the screws, all the components—including the RAM and SSD—are proprietary, making replacement parts more difficult to source.

Worst of all, this MacBook Air is not upgradeable after purchase. Like many generations of the Air, the RAM is soldered to the logic board, and SSDs are not compatible between generations.