add macos instructions to website

website/index.html

@@ -125,6 +125,14 @@
         <ol>
           <li><code>yaourt -S trimage</code></li>
         </ol>
+
+        <h3><img src="macos.png" alt="" /> macOS</h3><!-- Attribution for the image: VICDJES21 / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0) -->
+        Trimage is available from Homebrew, to install, type:
+        <ol>
+          <li><code>brew install trimage</code></li>
+        </ol>
+        <p>Launch by executing <code>trimage</code> in Terminal.app</p>
+
         <h3><img src="linux.png" alt="" /> Other *nix</h3>
         <ol>
           <li>Download the source via git or bzr (see repositories)</li>
@@ -142,8 +150,6 @@
           >
         </p>
         <!--
-          <h3><img src="mac.png" alt=""> Mac</h3>
-          <p>Trimage should be able to run on Mac. <a href="mailto:help@trimage.org">Help us with this</a></p>
           <h3><img src="windows.png" alt=""> Windows</h3>
           <p>Trimage should be able to run on Windows. <a href="mailto:help@trimage.org">Help us with this</a></p>
         -->