Expired certificate completely breaks macOS Logitech apps, user customizations

If you’re a Mac user with Logitech accessories and have noticed that your settings and customizations seem to have disappeared this week, you’re not alone.

The company’s Logi Options+ and G Hub apps for macOS abruptly stopped working on Monday, refusing to launch and resetting all accessories to default settings.

The culprit, according to a Logitech support page and Reddit posts from Logitech global marketing manager Joe Santucci, was a security certificate that was inadvertently allowed to expire, rendering both apps non-functional.

“The expired certificate is used to secure inter-process communications and the expiration prevents the software from starting properly,” Santucci wrote in an article. “We dropped the ball here,” he said in another post. “This is an inexcusable mistake. We are extremely sorry for the inconvenience caused.”

Logitech already offers fixes for both apps that include an updated certificate. But unfortunately for users, one of the features broken by the expired certificate is the in-app updater, which means there is no automated way for Logitech to fix this problem. Anyone who wants their apps to work and their customizations to return will have to manually grab the patch (or updated versions of the apps, which Logitech says it’s working on as well). If you use both apps, each will need to be fixed separately.