title: How can a Mac app be so retina unfriendly
body: <p>To my knowledge, the windows, labels, ... etc. are automatically retina-fied when they run on the new MacBooks with Retina Displays. That's the case with most of the apps I have (third party apps I didn't develop). However...</p>
  
  <p>There is this specific app (Yummy ftp), that just looks miserable on the retina. Every single "thing" within the window is non-retina-fied. Even the window's toolbar.</p>
  
  <p>In a counter example, many other apps just got automatically retina-fied (except raster images, CoreGraphics/CoreAnimation stuff, ...etc).</p>
  
  <p><strong>Showcase:</strong></p>
  
  <p>I did not scale these images. I am just screen capturing, cropping, and uploading.</p>
  
  <p><img src="https://i.stack.imgur.com/QBQru.png" alt="Yummy FTP non retinified"></p>
  
  <p><img src="https://i.stack.imgur.com/co9PW.png" alt="Daisy Disk retina-fied"></p>
  
  <p>As a cocoa developer, I would like to know the cause of such misbehavior, and how to avoid it.</p>