title: Latex package missing but tlmgr says I have it
body: <p>I'm trying to render a latex document I got from school. the problem seems to be coming from the document using the package "diagrams".</p>
  
  <p>I get the error: "diagrams.sty Latex error: File 'pstricks.sty' not found"</p>
  
  <p>When I go to the terminal and run <code>sudo tlmgr install pstricks</code>, I get the response <code>tlmgr install: package already present: pstricks</code>. So I'm not sure what to do next.</p>
  
  <p>I'm using the app TexPad on MacOS and just updated my tex install via MacTex. Thanks in advance for any advice! </p>