title: Is there a way to install tidymodels in R Version 3.6.1?
body: <p>I'm also currently running an older version of Rstudio (Version 1.1.463) as my mac is running El Capitan (not enough memory to update). When trying to install and run 'tidymodels' I receive: </p>
  
  <pre><code>Error: package or namespace load failed for ‘tidymodels’ in loadNamespace(j &lt;- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]): there is no package called ‘rstanarm’
  </code></pre>
  
  <p>I have then attempted to install 'rstanarm' and receive:</p>
  
  <pre><code>Package which is only available in source form, and may need compilation of
    C/C++/Fortran: ‘rstanarm’
  Do you want to attempt to install these from sources? (Yes/no/cancel)
  </code></pre>
  
  <p>Following any of these options is unsuccessful. Is it possible to use 'tidymodels' given my situation?</p>