When Logitech G Hub fails to open, kill the processes, restart the Updater service, then clean-reinstall from Logitech’s installer.
When the control app refuses to start, use this fast path to bring Logitech’s tuning suite back on Windows or macOS. You’ll find quick checks, solid fixes, and a clean reinstall plan.
Fast Triage: What You’re Seeing And Why
Start with symptoms. Each clue points to a short list of causes and a first move. Run through this table, then jump to the matching fix below.
| Symptom | Likely Cause | First Action |
|---|---|---|
| Stuck on spinning G logo | Hung background service | Restart LGHUB Updater service |
| No window after click | Zombie processes or corrupt cache | End LGHUB.exe and agent, clear data folders |
| Crash after update | Broken install | Run installer and pick Reinstall |
| Mac asks for access, then stalls | Missing privacy permissions | Grant Accessibility and Input Monitoring |
| Devices show inactive | USB/Bluetooth permission or driver glitch | Replug receiver and allow accessory prompts |
What To Do When The G Hub App Refuses To Start
Follow these steps in order. The early steps are quick and fix most cases. If the app still won’t open, the clean reinstall section wipes leftovers and gives you a fresh start.
Step 1: Quit Everything Related To The App
On Windows, open Task Manager. End LGHUB.exe, lghub_agent.exe, and any duplicate entries. Leave lghub_updater.exe alone for now since it helps recover the install. On macOS, quit from the menu bar and force-quit “Logitech G HUB” and “Logitech G HUB Agent” in Activity Monitor.
Step 2: Restart The Updater Service (Windows)
Open Services (Win + R → services.msc). Find LGHUB Updater Service, right-click, and pick Restart. If Startup type isn’t Automatic, set it and apply the change. Launch the app again.
Step 3: Clear The Cache Folders
On Windows, delete C:\Users\<You>\AppData\Roaming\LGHUB and C:\ProgramData\LGHUB. If you see old.LGHUB, remove it too. On macOS, remove /Users/Shared/LGHUB and the folder at /Library/Application Support. Then try to open the app.
Step 4: Fix Permission Prompts On macOS
macOS needs privacy grants for features like keystroke handling and screen capture. Go to System Settings → Privacy & Security. Enable the entries for the app under Accessibility, Input Monitoring, and Screen Recording. If a box is already checked, uncheck and re-check it, then choose Quit & Reopen when prompted.
Step 5: Use Logitech’s Repair Or Reinstall Path
Run the current installer. When it detects a broken setup, choose Reinstall. This removes and replaces the program files in one pass and often resolves loops at startup.
Windows Fixes, In Detail
Restart Hung Services And Processes
Close the tray icon first. In Task Manager, end LGHUB.exe and the agent process. Switch to the Services tab and restart LGHUBUpdaterService. Wait a few seconds until the status shows Running, then try to launch again. Logitech’s looping-logo startup guide outlines the same restart flow.
Remove Corrupt Data Safely
Two folders hold settings and cache. Delete the Roaming path under your profile and the ProgramData path at C:. If Windows refuses, reboot and try again.
Run A Clean Reinstall
Some updates leave behind stale files. A fresh install clears that. After removing the data folders, reboot, download the newest build, and install. Logitech’s install/uninstall guide lists the folders and steps. Plug back your gear and confirm detection.
Check The Service Configuration
Open Services, set LGHUB Updater Service to Automatic, and start it. This service manages driver and app updates and a disabled state can block the launcher.
Double-Check Windows Itself
Install pending Windows updates. If system files are damaged, run sfc /scannow from an elevated Command Prompt. These steps rule out OS-level blockers that can keep the UI from opening.
macOS Fixes, In Detail
Grant The Right Privacy Permissions
Open System Settings → Privacy & Security. Under Accessibility and Input Monitoring, enable the entries for the agent and the main app. Under Screen Recording, allow capture if you rely on screenshot keys or overlays. Restart the app after changes.
Reset Login Items And Kernel Bits
In System Settings → General → Login Items, make sure Logitech items are allowed to run. If a UBC/driver prompt appears when you plug in a receiver, click Allow. That prompt controls whether USB accessories can talk to the software.
Clear Mac Data Paths
Delete the shared data folder at /Users/Shared/LGHUB and the folder at /Library/Application Support/LGHUB. Remove launch files named com.logi.ghub.plist from LaunchAgents and the updater plist from LaunchDaemons, then reboot.
When A Device Stays Inactive
If the app opens but a mouse, keyboard, or headset shows inactive, replug the receiver or USB cable, switch ports, and let macOS show the accessory prompt. On Windows, try a different USB port and confirm the device appears in Device Manager without warning icons. After that, refresh the device list inside the app.
Keep It Stable After You Fix It
A few small habits prevent repeats. Let updates finish. Don’t end tasks mid-update. Quit the app before shutdown. Keep the OS current. Small steps, fewer headaches.
Clean Reinstall, Step By Step
Use this when quick fixes fail or the app loops at launch. Back up custom profiles if needed, then follow the platform column that matches your PC.
| Step | Windows | macOS |
|---|---|---|
| Quit the app | End LGHUB.exe and agent in Task Manager | Quit from menu bar, force-quit in Activity Monitor |
| Remove data | Delete Roaming\LGHUB and ProgramData\LGHUB | Delete /Users/Shared/LGHUB and /Library/Application Support/LGHUB |
| Remove launch files | — | Delete LaunchAgents and LaunchDaemons plists |
| Reboot | Restart Windows | Restart macOS |
| Install fresh build | Run the latest installer and choose Reinstall if offered | Drag new app to Applications and run once |
| Verify | Start the app, check devices | Start the app, grant prompts |
Why These Fixes Work
The app depends on a background updater. If it hangs, the UI can stall at the logo. Restarting that service clears the blockage. Corrupt cache folders can also block the start path, so removing them forces the app to rebuild clean data. On macOS, privacy controls gate keystrokes, USB, and screen capture. Granting permissions removes that roadblock and lets device features work.
Official References For Deeper Help
Logitech’s own guides match the steps above. The page about frozen startup and the looping logo walks through quitting the app, killing the agent, and restarting the updater service on Windows, with a parallel path for macOS. The install, uninstall, and update troubleshooting page lists the full clean reinstall flow and all the folders to delete.
Deeper Diagnostics For Stubborn Cases
Run The App As Admin
Right-click the shortcut and choose Run as administrator. This single change solves launch issues on accounts with tight UAC rules or when the installer left file permissions in a bad state.
Check Startup Entries
Open Task Manager → Startup. Enable Logitech entries. A disabled startup hook can stop background pieces from launching, which leaves the UI waiting forever.
Repair With The Same Installer You Used
The current installer detects a broken setup and offers Reinstall. That path follows Logitech’s own repair flow and keeps drivers and services aligned with the app build.
Match Your OS Version
G HUB supports the latest three macOS releases and recent Windows builds, per the notes on the product page. If you’re far behind on updates, the UI may never appear. Update the OS, then try again.
Profile Safety: Back Up And Restore
If you keep custom DPI steps, macros, or LIGHTSYNC effects, back them up before a wipe. Copy profile files from the Roaming or Shared folders. After a clean install, restore one device at a time. If one profile crashes the app, rebuild that one.
Quick Paths You Can Bookmark
- Looping logo startup guide — covers killing the agent and restarting the updater on Windows and the quit/force-quit flow on macOS.
- Install/Uninstall/Update troubleshooting — full clean reinstall steps and folder paths for both platforms.
Edge Cases And Real-World Fixes
Stalls After A Game Patch
Some titles reset device hooks or block overlays on launch. Close the game, start the tuning app first, then relaunch the game. If a game overlay steals focus, turn that overlay off and test again.
USB Receiver Doesn’t Wake Devices
Move the receiver to a direct motherboard port, not a hub. Avoid front-panel ports with weak power. If you use a desk extension cable, keep it short and point the receiver toward the mouse or keyboard.
Extra Fixes That Users Try
Windows: The App Opens Only After A Reboot
Check that the updater service is set to Automatic and Running. If it flips to Disabled, set it back and apply. Some third-party tweaker tools turn services off; recheck after you run them.
Windows: The Uninstaller Fails
Use the installer’s Reinstall option, then uninstall normally. If it still refuses, delete the ProgramData and Roaming folders, reboot, and install fresh.
macOS: It Keeps Asking For Access
Open Privacy & Security. Remove the entries for the app under Accessibility and Input Monitoring, then add them back. Click Quit & Reopen to grant the access.
Credits And Safe Links
See Logitech’s page on frozen startup and looping logo and the full install/uninstall/update troubleshooting. For current OS coverage, check the G HUB product page.