MacBook Cant Install Sierra
Hi. I have MacBook Air Mid-2011, 11-Inches and I can't install macOS Sierra. Im on OS X El Capitan. how can I fix this problem?
MacBook Air
Lots of people are experiencing difficulties installing macOS Sierra from the above link.
As your Mac can run macOS Sierra it can also run macOS High Sierra, High Sierra
still receives security updates.
How to upgrade to macOS High Sierra - Apple Support
Before upgrading make a full back up of your Mac.
Check that third party apps you use have updates available for the new OS.
Check that your printers/ scanners etc have updated drivers and software available for the new OS.
