Getting "app is damaged and can't be opened" errors on your Mac? Here's the fix!

[iMore.com]

Apple seems to have allowed the security certificate for the Mac App Store to expire yesterday and while they've since issued a new one, not every Mac seems to have picked it. So, if you're trying to launch an app and all you get is the "damaged and can't be opened" popup, here's what you need to do.

Full story from the iMore Blog...