Which OS for a 2GB RAM MacBook Air from 2011? My Macbook Air from mid 2011 has 2 GB RAM, its processor is 1.6 GHz i5, 64 GB of flash storage. Its OS is the one it had originally, Lion.

Many apps require to upgrade the OS - e.g Slack. Yet I don't think going for Sierra with 2 GB RAM is a good idea, and I can't upgrade the RAM as it is impossible on new Macbook Airs.

Which OS would my MBA handle, would Yosemite or Mavericks be manageable for it ?
It will take Sierra - which means unless you already have any earlier OS in your App Store purchase history, that's the only one you can get for it.

Source: Everymac