Logitech Inconveniences Customers with Poor Certificate Management

If you use Logitech devices with your Mac, you likely weren’t a happy camper back in January!

Right after celebrating the new year, Logitech customers booted up their MacBooks to find that their device customizations were gone. Angry users flooded the Logitech forums asking, “What the heck happened?” Since you’re here reading this particular blog, you probably already guessed what happened: a certificate expired!

Logitech distributes the macOS apps “Options+” and “G HUB,” which manage customization settings for the myriad peripherals they manufacture, ranging from Bluetooth mice and keyboards to gaming gear and high-end streaming headsets. The apps had been digitally signed with a certificate that later expired. This rendered the apps, which require relatively high permissions on macOS, inoperative. The tech accessory giant issued a patch relatively quickly, but users still had to go through an out-of-band manual process to apply it. It was a brand-damaging nightmare.

If you’re at least vaguely familiar with how code signing works, this might sound confusing.

In most code-signing scenarios, a signature can still be validated even after the signing certificate has expired, as long as the certificate chains to a trusted root CA and the signature includes a trusted timestamp, which proves that the software was signed while the certificate was still valid.

So why did Logitech’s apps break?

Since the “Options+” and “G HUB” apps are distributed outside of the Mac App Store, they are required to be signed with an Apple “Developer ID” certificate, and Developer ID serves a broader purpose than code signing.

Developer ID certificates are exclusively issued through the Apple Developer Program. A Developer ID signature is used by Gatekeeper, under default settings, to verify that the software is from an identified developer, is notarized by Apple, and that the code has not been altered. Beyond simple code-signing verification, it plays a role in establishing the app’s identity and entitlements on macOS. This controls what the app is and isn’t allowed to do on the system.

In summary, for macOS apps distributed with Developer ID, trust is evaluated in the context of Gatekeeper and Apple’s notarization and code-signing policy; it’s not just a simple timestamped signature check. That distinction is important, especially for apps that require advanced capabilities on macOS.

Normally, a valid Developer ID certificate is only strictly required when signing updates and new releases. However, Logitech needs to use a Developer ID provisioning profile for advanced capabilities on macOS. In that scenario, the certificate expiring results in the app not being able to run at all.

The Logitech incident is a reminder that certificate management is an operational discipline, not just a security checkbox. As organizations rely more heavily on PKI to secure software, devices, identities, and services, the consequences of poor certificate lifecycle management become increasingly severe. In this case, the issue manifested as a customer-facing (and brand-bruising) outage.

For companies shipping software, that means certificate inventory, renewal planning, testing, and deployment processes must be treated as critical business functions. Logitech’s January disruption is simply one more example of what can happen when those processes fail.