title: how to search for strings wtihin json files on Mac Sierra
body: <p>I am trying to search for a string across files in a Mac.  Sierra v10.12.5.  Using the finder, I search for files of type 'json', then using the '+' for advanced search features, I select 'contents' and my string in the textbox.  Nothing is returned.  If I change the file extension from .json to .txt, the files containing the string in the textbox are returned.  So this seems isolated to files of type .json</p>
  
  <p>Today a visit to the genius bar confirmed what I saw.  However, the 'genius' told me that's all he could tell me about the subject.  I took his response as code for "you found a bug, too bad"  He said to search the web to find an unsupported solution.  Unfortunately, I haven't found a workaround.  Does anyone have an idea?</p>