Same here. I had connected several time without issue to my Windows 7 laptop to copy screen captures. I decided to connect to my Mac Mini desktop this morning but no go. As soon as I plug it in the screen light goes out and the page refreshes a few times. I even noticed the WiFi icon flash separately from the screen refreshes. I tried two different cables on all the Mac's USB ports, still no connections. I never had any issues connecting my Kindle Touch to my Mac.