Macbook Pro late 2011 Mac OS X Lion 10.7.5 cannot update

Hi,

The latest macOS for late 2011 MacBook Pro is Hight Sierra which is available at following site.

How to download and install macOS - Apple Support

If you can't connect to App Store, upgrade to Sierra which is available above site first, then upgrade to High Sierra which available above site.

I suggest an even more conservative approach. Upgrade to 10.11 El Capitan as a waypoint, even if you intend to go further.

10.11 El Capitan is the first MacOS with 'modern' encryption, and (after all software updates are applied) an up-to-date Mac App Store, and will make any further upgrades much easier.

If you find you cannot obtain MacOS 10.11 El Capitan from that web site, post back for a direct link that does not require httpS: encryption.

How to download and install macOS - Apple Support