title: Unable to debug after installing Android 5.1.1 on Nexus 5
body: <p>Today I received the Android 5.1.1 update on my Nexus 5. After updating the device I'm unable to connect it to adb (in Android Studio on Mac OS X) via USB.</p>
  
  <p>Developer options are enabled, tried to toggle usb debug off &amp; on, changed usb memory emulation from storage to camera and viceversa, rebooted the device, but no way to see my Nexus 5 listed in "Choose Device" window.</p>
  
  <p>Any suggestion?</p>
  
  <p>Thanks.</p>
  
  <p>Paolo</p>