So I thought I'd share this as I've just gotten this to work - my 7yo son is getting his pump fitted on Tues and we have it at home so I can experience what his life will soon be like, always connected. Anyway - as usual, the medtronic site checks the OSX version a refuses to let the pump connect to 10.8 - only allowing support for 10.7 or less. I gather it took close to a year before they let 10.7 on. Anyway, you can bypass this needless limitation by enabling the develop menu in Safari, then going to user agent and choosing Safari 6, Mac. Initially I still failed to get the applet to load, until I noticed a dialog box to confirm I wanted to allow the applet to run was behind my browser window. Anyway, that's all you need for you pumpers wanting to keep carelink and Mountain Lion.