How to upgrade from Mac OS 10.11 to 10.13

Don't use FireFox for this link…

https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12

If you get a corrupted message...

Naw, not damaged, it's just that you have an old copy already in Applications,Trash the Install MacsOS High Sierra.app in Applications then a new copy of a more recent version can be downloaded..

Open in Safari, other browsers won't work.

https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?ls=1&mt=12

You need one of these…

Mac Hardware Requirements

For details about your Mac model, click the Apple icon at the top

left of your screen, choose About This Mac. These Mac models are

compatible with macOS High Sierra:

• MacBook (Late 2009 or newer)
• MacBook Pro (Mid 2010 or newer)
• MacBook Air (Late 2010 or newer)
• Mac mini (Mid 2010 or newer)
• iMac (Late 2009 or newer)
• Mac Pro (Mid 2010 or newer)

You're welcome.

why can't I upgrade my macOS from version 10.12 to 10.13

or how can I?

what year sorry

You should start your own thread.

explain in full details please

I dont understand