An expired certificate led to the Logitech app going down for Mac users and despite a quick fix, G Hub is taking heat for 'long-standing issues' and 'AI nonsense'

If you use Logitech gear on a macOS device—perhaps you got a brand new MX Master 4 over the holidays—and spotted it stopped working, that's because Logitech forgot to update its dev certificate. Whoopsie.

As reported by The Verge, the Logitech Subreddit saw Mac users complaining that their app wasn't working, and one comment showed that Logitech's developer certificate expired on January 6, 2026. Renewed five years previously on January 5, 2021, Logitech will have to stay vigilant at the start of 2031 to catch the same mistake.