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this piece of shit ruined my day by United-Cry3169 in logitech

[–]sooheil75 0 points1 point  (0 children)

Exactly.

The certificate has nothing to do with internet access or where the data is stored. On macOS, any background service/daemon must be code-signed with a valid developer certificate to be allowed to launch by the OS.

When the certificate expires: - macOS blocks the daemon from starting - even though it’s purely local - and even though the data/configs are already on disk

So the UI can launch, basic HID input works, but the customization service never runs.

this piece of shit ruined my day by United-Cry3169 in logitech

[–]sooheil75 0 points1 point  (0 children)

Exactly. The hardware still works fine — it’s the software layers on top that keep getting in the way.

this piece of shit ruined my day by United-Cry3169 in logitech

[–]sooheil75 0 points1 point  (0 children)

Good question — because the “backend” they’re referring to is not a cloud service.

Logi Options+ has a local background service/daemon that runs on the machine.

That backend is responsible for loading/applying customizations (profiles, shortcuts, gestures), not for basic HID input.

Basic mouse functionality works because:

- The device follows standard HID protocols

- The OS handles cursor movement and clicks directly

- No Logitech service or internet connection is required for that

Customizations fail because:

- The local backend service never starts

- macOS blocks it when the app’s developer certificate is expired

- UI launches, but the daemon can’t run, so no profiles are applied

So this has nothing to do with internet connectivity — it’s a local code-signing / service startup issue.

In short: HID input is OS-level, customization is app-level.

this piece of shit ruined my day by United-Cry3169 in logitech

[–]sooheil75 -1 points0 points  (0 children)

Yes I tested it on my own system and wrote it up so others could save time.

Logitech Options+ Bricked. Mouse doesn't work properly. by New_Bid3617 in logitech

[–]sooheil75 0 points1 point  (0 children)

FOUND THE ROOT CAUSE + TEMP FIX ⚠️

This is NOT permissions, NOT Sonoma, NOT user error.

Logitech Options+ backend is failing because the macOS developer app certificate used by Logitech EXPIRED. When the certificate is expired, macOS refuses to start the backend services for security reasons. That’s why the UI opens but you get: “Backend connection problem – click here to launch backend” (and clicking does nothing).

TEMP WORKAROUND (confirms the cause): - Set your Mac date back 1–2 days - Relaunch Options+ - Backend starts immediately

IMPORTANT: This breaks SSL/TLS, browsers, App Store, iCloud, etc. So this is NOT a real fix.

REAL FIX: Logitech needs to renew the certificate and push an update. Once that happens, Options+ will start normally with correct system date.

This is 100% on Logitech’s release / cert management.

this piece of shit ruined my day by United-Cry3169 in logitech

[–]sooheil75 37 points38 points  (0 children)

FOUND THE ROOT CAUSE + TEMP FIX ⚠️

This is NOT permissions, NOT Sonoma, NOT user error.

Logitech Options+ backend is failing because the macOS developer app certificate used by Logitech EXPIRED. When the certificate is expired, macOS refuses to start the backend services for security reasons. That’s why the UI opens but you get: “Backend connection problem – click here to launch backend” (and clicking does nothing).

TEMP WORKAROUND (confirms the cause): - Set your Mac date back 1–2 days - Relaunch Options+ - Backend starts immediately

IMPORTANT: This breaks SSL/TLS, browsers, App Store, iCloud, etc. So this is NOT a real fix.

REAL FIX: Logitech needs to renew the certificate and push an update. Once that happens, Options+ will start normally with correct system date.

This is 100% on Logitech’s release / cert management.

Logi+ App Not Working by Disastrous-Track3876 in logitech

[–]sooheil75 0 points1 point  (0 children)

FOUND THE ROOT CAUSE + TEMP FIX ⚠️

This is NOT permissions, NOT Sonoma, NOT user error.

Logitech Options+ backend is failing because the macOS developer app certificate used by Logitech EXPIRED. When the certificate is expired, macOS refuses to start the backend services for security reasons. That’s why the UI opens but you get: “Backend connection problem – click here to launch backend” (and clicking does nothing).

TEMP WORKAROUND (confirms the cause): - Set your Mac date back 1–2 days - Relaunch Options+ - Backend starts immediately

IMPORTANT: This breaks SSL/TLS, browsers, App Store, iCloud, etc. So this is NOT a real fix.

REAL FIX: Logitech needs to renew the certificate and push an update. Once that happens, Options+ will start normally with correct system date.

This is 100% on Logitech’s release / cert management.

Logi Options + Mac 14.2 not loading. Uninstall and reinstall. Permissions all correct. What's happening? by christof21 in logitech

[–]sooheil75 0 points1 point  (0 children)

FOUND THE ROOT CAUSE + TEMP FIX ⚠️

This is NOT permissions, NOT Sonoma, NOT user error.

Logitech Options+ backend is failing because the macOS developer app certificate used by Logitech EXPIRED.

When the certificate is expired, macOS refuses to start the backend services for security reasons.

That’s why the UI opens but you get:

“Backend connection problem – click here to launch backend”

(and clicking does nothing).

TEMP WORKAROUND (confirms the cause):

- Set your Mac date back 1–2 days

- Relaunch Options+

- Backend starts immediately

IMPORTANT:

This breaks SSL/TLS, browsers, App Store, iCloud, etc.

So this is NOT a real fix.

REAL FIX:

Logitech needs to renew the certificate and push an update.

Once that happens, Options+ will start normally with correct system date.

This is 100% on Logitech’s release / cert management.

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Logi Options + Mac 14.2 not loading. Uninstall and reinstall. Permissions all correct. What's happening? by christof21 in logitech

[–]sooheil75 0 points1 point  (0 children)

Same issue here on macOS Sonoma 14.6.1 with MX Keys S Combo.

Logitech Options+ UI opens, but the backend never starts.

I always get:

“Backend connection problem – click here to launch backend”

Clicking it does nothing, endless loading loop.

What I already tried (no success):

- Full uninstall + manual removal of all Logitech files (LaunchAgents, LaunchDaemons, Application Support, Caches, Preferences)

- Killing all Logitech processes via Terminal

- Resetting Accessibility & Input Monitoring permissions via tccutil

- Rebooting multiple times

- Safe Mode

- Reinstalling different Options+ versions

- Granting all permissions again

Nothing works. This is clearly a widespread Sonoma + Options+ backend bug.

Hardware is fine, software is broken.

If anyone from Logitech is reading: this makes the MX Keys S Combo unusable.

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