Apps Crashing At Launch - It’s Another Expired Certificate Issue

Over the weekend I noticed that some of my favorite Apps, including 1Password and PDFpen were having problems upon launch. Turns out, it’s a widespread problem affecting many apps that were directly downloaded form the developer site (not Mac App store versions) due to an expired provisioning profile and format change in the developer certificate.

This blog post from the gang at 1Password goes into more detail. MacRumors also has more on the issue.

The fix seems to be to re-download a fresh copy of the App from the developer’s website.