Explain what to do when an intermediary Tails is not detected on Mac (Will-fix: #15025)

wiki/src/install/inc/steps/restart_first_time.inline.mdwn

@@ -87,6 +87,12 @@ from a Tails DVD in a similar way.</p>
    [[!inline pages="install/inc/steps/mac_startup_disks.inline" raw="yes" sort="age"]]
    </div>
 
+   <div class="bug mac">
+   <p>If only your Macintosh hard drive appears, you can try
+   reinstalling an intermediary Tails from [[Windows using
+   <span class="application">Universal USB Installer</span>|win/usb]].</p>
+   </div>
+
 1. If the computer starts on Tails, the <span class="application">Boot Loader Menu</span>
    appears and Tails starts automatically after 4 seconds.</p>