TL;DR
Some Logitech mice stopped working on Macs after the company’s Apple developer certificate expired, preventing the companion software from launching. Logitech acknowledged the error, posted an apology and published manual patch installers for its Options+ and G HUB apps.
What happened
A Mac user on Reddit reported that an MX Master 3S suddenly began behaving incorrectly — the scroll direction changed and extra buttons stopped working — and that the companion Logi+ app was caught in a boot loop. The user said they tried restarting the Mac, resetting the mouse and reinstalling the app without success. Community troubleshooting identified the underlying cause as an expired Apple Developer Certificate for Logitech, which meant the signed Mac apps could not run. Because the certificate was invalid, the apps also could not be updated automatically. Logitech quickly acknowledged the lapse, called it an inexcusable mistake, and published a support page with manual installers to restore functionality. The company provided a patched installer for Options+ that should relaunch the app and recover devices and settings, and a separate patched installer workflow for G HUB.
Why it matters
- An expired developer certificate can prevent signed Mac software from running and block automatic updates, disrupting users.
- Users of external peripherals can lose customizations and functionality if companion software is disabled.
- The incident highlights operational risks tied to certificate management and software signing for third-party Mac developers.
- Manual intervention may be required to restore service when automated update paths are blocked.
Key facts
- Initial report came from a Reddit user reporting issues with an MX Master 3S for Mac.
- Symptoms included reversed scroll direction and nonfunctional extra buttons.
- The Logi+ companion app was reportedly stuck in a boot loop on the affected Mac.
- Attempts to fix the problem by restarting the Mac, resetting the mouse and reinstalling the app failed.
- Cause identified as an expired Apple Developer Certificate for Logitech’s Mac software.
- Because the certificate was invalid, the apps could not be automatically updated.
- Logitech publicly apologized and described the situation as an inexcusable mistake.
- The company posted a support page and provided patched installers for Options+ and G HUB to restore functionality.
- Options+ patch steps: download the installer, double-click it, and the installer should close and relaunch Options+ with devices and settings restored.
- G HUB patch steps: download and double-click the installer, then exit when a “software already exists” message appears.
What to watch next
- Whether additional Logitech Mac apps or other peripherals are affected: not confirmed in the source
- Whether Logitech will outline changes to prevent future certificate expirations: not confirmed in the source
- Whether Apple will change any vetting or notification processes for expiring developer certificates: not confirmed in the source
Quick glossary
- Apple Developer Certificate: A digital credential issued by Apple that allows developers to sign macOS apps so they can run on Macs without being blocked by security features.
- Code signing: The process of digitally signing software to verify its origin and ensure it hasn't been tampered with since signing.
- Boot loop: A condition where an application repeatedly restarts and fails to reach a stable running state.
- Companion app: Software on a computer or mobile device that provides configuration, customization or extended functionality for an external peripheral.
Reader FAQ
What caused Logitech mice to stop working on some Macs?
Logitech allowed its Apple Developer Certificate to expire, preventing signed Mac apps from running; this is confirmed in the source.
Which Logitech device was reported as affected?
A Reddit user reported problems with an MX Master 3S for Mac; broader impact is not specified in the source.
Can the affected apps be updated automatically?
No. The expired certificate meant the companion apps could not be automatically updated, according to the source.
How do I restore functionality?
Logitech published manual patch installers and step-by-step instructions for Options+ and G HUB on a support page; follow those downloads and installer steps as described by Logitech.
Will my settings and customizations be preserved?
For Options+, Logitech’s instructions say devices, settings and customizations should be fully restored; for other details, not confirmed in the source.
I think Apple should take this radical approach to the new Siri Ben Lovejoy Jan 5 2026 MAC LOGITECH Logitech mice stop working on Macs for an embarrassing reason, require…
Sources
- Logitech mice stop working on Macs for an embarrassing reason, require manual fix
- Logitech macOS Certificate Expiry Outage: Code Signing …
- Logitech options not working on Mac
- expired certifications on mac os packages
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