To find and install an update, click QuickBooks > Check for QuickBooks Updates. To minimize the chances of running into issues, you should make sure you’ve installed the latest update for your software. If you decide to upgrade your OS, you may find that most things in your QuickBooks for Mac work for you, but if you run into a problem, we may not be able to help you. (Note that QuickBooks 2012 is supported on Mountain Lion.) Read more about this on Little Square. QuickBooks 2011 and prior are not supported on Mountain Lion. You may be wondering how Mountain Lion will affect your version of QuickBooks for Mac. Like a lot of Mac users, everyone on the QuickBooks for Mac team is excited about the upcoming release of OS X 10.8: Mountain Lion. While the email notes “you may find that most things in your QuickBooks for Mac work for you” after upgrading to Mountain Lion, the company will only officially support QuickBooks 2012 on 10.8. It informed them QuickBooks 2011 would not be supported on Mountain Lion. The email below was sent to a reader from Intuit’s QuickBooks for Mac team. We received a tip today that may be of interest to QuickBooks users planning to upgrade to Mountain Lion this week.