Logitech Mac Apps Fail Over Expired Certificate

Millions of Mac users relying on Logitech peripherals faced sudden disruptions this week when the company's configuration software stopped functioning due to an expired security certificate. The issue, which began on January 6, affected Logi Options and G HUB applications on macOS, rendering custom settings for mice and keyboards inaccessible and forcing devices to revert to default behaviors.

Users across online forums, including Reddit, reported that the apps failed to launch, displayed persistent loading screens, or entered endless boot loops. For devices like the MX Master series mice and MX Keys keyboards, this meant lost customizations such as button remapping, scroll adjustments, gesture controls, and RGB lighting profiles. One user described their MX Master 3S mouse abruptly changing scroll directions and ignoring programmed buttons, prompting futile attempts at resets and reinstalls. The outage left peripherals operating in basic modes, frustrating professionals and gamers who depend on tailored setups for productivity and gaming.

The root cause was an expired Apple Developer ID certificate, a digital signature required by macOS to verify the authenticity and safety of...