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
What is an appropriate quantitative test to determine which of the three will run on the MacBookAir4,1 with a comparable performance to El Capitan? While anecdotal reports are fine, any benchmarks to support a position should alleviate the issue of being 'opinion based'.