As I understand the matter, it is generally better to use a later version, however, I realize that the newer versions are really designed for more powerful hardware. The MacBookAir4,1 in question is a dual core I5 1.6 Ghz CPU with 4GB of RAM. It is currently running El Capitan.
The choices include:
- Mojave (latest, requires 2012 or later Macbook Air) - High Sierra - Sierra
Which of the three will run on the MacBookAir4,1 with a comparable performance to El Capitan?