title: RStudio Required Package Versions Could Not Be Found
body: <p>I updated my Mac to OS10 and attempting to run RStudio Knit, and get the error:</p>
  
  <pre><code>"evaluate 0.7.2 is required but 0.7 is available".  
  </code></pre>
  
  <p>I tried this and did not fixed the issue:</p>
  
  <pre><code>remove.packages("evaluate")
  install.packages("evaluate")
  </code></pre>
  
  <p>Any help would be appreciated.</p>