I have also bee unsuccessful in making a child theme from Evolve. I am able to create a style.css file that correctly loads the main theme. However, the width attributes for the slider and the web pages gets all messed up. Is there some other file that also needs to be copied to the directory for the child theme? For the time being I will live with my edits to the Evolve theme and refrain from doing any updates. You can see the current version of the web site here.