Could not resolve SDK Path for 'macosx' white installing capybara-webkit

[vilola]

I am trying to install capybara-webkit gem on my macbook (sierra 10.12.6) but I still have some problems. I installed Xcode, gt, I tried almost every solution but I think I made it even worse :(

Now the error is "Could not resolve SDK Path for 'macosx'". Full message is on image.

Can someone help me please? :-/

[MarcoHarris]

This might help:

therecipe/qt#327
https://stackoverflow.com/questions/41513456/qt-5-7-xcode-8-1-os-x-el-captain-could-not-resolve-sdk-path-for-macosx

[wtfiwtz]

Looks like you need to install xcode on Mac OS X