title: how come my android devices are not visible on my Mac?
body: <p>I'm new to android development so apologies if this is a stupid question.</p>
  
  <p>I'm having trouble seeing my android devices in Eclipse. I've switched on USB debugging, configured them to connect as a camera not mass storage, but when I run ./adb devices, there's no device showing, even though I have a Samsung Galaxy and a LG Nexus connected via USB. On both phones I get a notification saying "USB debugging connected" and "connected as a camera" so the phone obviously thinks it's connected.</p>
  
  <p>The problem appears to be intermittent. Sometimes the Galaxy shows up:</p>
  
  <pre><code>Macbook:~/workspace/android-sdks/platform-tools ./adb devices
  List of devices attached 
  3334AB246B5200EC    device   
  </code></pre>
  
  <p>Then I unplug and reconnect it, and it disappears.</p>
  
  <p>I've tried 3 cables and 2 devices now. Should I just give up and use an emulator instead?</p>