I updated my iMac Mid-2010 to Mountain Lion and my wife's MacBook, Aluminum, Late 2008. Mine was downloaded first and I continued with install. After the install I was given an alert for installing Java. As I was about to press yes, another popup came up and all I saw was my click on a bubble saying "Never on this Mac" or something of the sorts. Hoping that it wasn't anything important (I hope someone tells me otherwise) I moved on to installing the Java update, which took just as long as the Mountain Lion install. After a restart I proceeded to check the iCloud setup in settings, open calendar, open mail, notes, reminders. None of them loaded. Mail said it was updating and stopped halfway. Calendar said it was updating and just kept going. iCloud setup also just had the spinning wheel. I checked activity monitory and the settings and calendar app had stopped responding. I forced quit everything restarted and tried again. No luck. Loaded everything again and got the same hangups. Force quit, restarted, tried again. Now i am on my wife's MacBook, writing this, where everything is running smooth and quick without issues. Anyone else having issues with iCloud, Calendar, Mail setup after installing Mountain Lion? Any one know what that pop up could've been? Any suggestions? Any help? Thanks.