Update pdf.html

Author: ergenekonyigit

sections/media/pdf.html

@@ -15,7 +15,7 @@ <h3>The <code>browser window</code> module in Electron has a property, <code>web
     <div class="demo">
       <div class="demo-wrapper">
         <button id="print-pdf-demo-toggle" class="js-container-target demo-toggle-button">Print to PDF
-          <div class="demo-meta u-avoid-clicks">Supports: Win, OS X, Linux</div>
+          <div class="demo-meta u-avoid-clicks">Supports: Win, macOS, Linux</div>
         </button>
         <div class="demo-box">
           <div class="demo-controls">