I uninstalled operating system on 2010 MacBook Air. The auto reinstall process fails using Command R or Alt Command R
I downloaded .dmg file, but no matter what I do the MacBook will not reload operating system from USB .dmg. I can get on Safari, but dang, I can not find a direct link. Why is it so hard to just download an operating system? There must be a way. Apple support is all riddles and point to .dmg files. I am frustrated. I have no other MACS, but can download files to USB by PC that the MacBook Air can see.