I upgraded to Mountain Lion and now I can not use Mac Office

Greetings,

What you posted is rather vague. By doesn't work do you mean the applications don't open at all or are you getting a message stating that your product needs activation? If it's product activation then that is something that Microsoft will have to assist you with. If your problem is that the applications simply won't open you may have to uninstall and reinstall Office again. This is common on the Windows platform too. Rarely when you upgrade to a new OS Office sometimes has an issue with the upgrade and won't open correctly. I would suggest merely uninstalling and reinstalling. Nine times out of ten that helps.

http://support.apple.com/kb/TS3938

If you have a version of Office earlier than Office 2008 it won't work and you'll need to upgrade - I think Office 2011 is the current version.

If you have Microsoft Office 2004, instead of buying an upgrade for it, you might find that switching over to OpenOffice is a better deal seeing as how it is free.

Allan