title: convert .pem to .ppk on macos
body: <p>There are lots of SO posts on this topic but most of them are for Windows and use the GUI. All others posts seem to use the CLI. </p>
  
  <p>Is there a GUI version of puttygen on MacOS/Linux and if so instructions on how to install/use? The CLI seems to give me an error. </p>
  
  <pre><code>Usage: puttygen ( keyfile | -t type [ -b bits ] )
                  [ -C comment ] [ -P ] [ -q ]
                  [ -o output-keyfile ] [ -O type | -l | -L | -p ]
  
  
  &gt;puttygen mykey.pem -t rsa -b 2048 -o mykey.ppk
  puttygen: cannot both load and generate a key
  </code></pre>
  
  <p>Is there something wrong with my commands? </p>