Important: These troubleshooting steps go from easy to more advanced. Please follow the steps in order and check if the device works after each step.

Make sure you have the latest version of macOS
Apple is regularly improving the way macOS handles Bluetooth devices. For instructions on how to update macOS, click here.

Make sure you have the right Bluetooth parameters

1. Navigate to the Bluetooth preference pane via Apple Menu > System Preferences > Bluetooth
   
   
2. Make sure that Bluetooth is turned On.
   
3. In the bottom-right corner of the Bluetooth Preference window, click Advanced.
   
4. Make sure both options are checked:
   • Open Bluetooth Setup Assistant at startup if no keyboard is detected
   • Open Bluetooth Setup Assistant at startup if no mouse or trackpad is detected 
     NOTE: These options ensure that Bluetooth Setup Assistant will launch if a Bluetooth keyboard, mouse, or trackpad is not detected as connected to your Mac.
5. Click OK.

Restart the Bluetooth connection on your Mac

1. Navigate to the Bluetooth preference pane in System Preferences:
   Go to Apple Menu > System Preferences > Bluetooth
2. Click Turn Bluetooth Off.
   
3. Wait a few seconds, and then click Turn Bluetooth On.
   
4. Check to see if the Logitech Bluetooth device is working. If not, go to the next steps.

Remove your Logitech device from the list of devices and try to pair again

1. Navigate to the Bluetooth preference pane in System Preferences:
   Go to Apple Menu > System Preferences > Bluetooth
2. Locate your device in the Devices list, and click on the “x” to remove it.
   
   
   
3. Re-pair your device by following the procedure described here.

Disable the hand-off feature
In some cases, disabling the iCloud hand-off functionality can help.

1. Navigate to the General preference pane in System Preferences:
   Go to Apple Menu > System Preferences > General
   
2. Make sure Allow Handoff between this Mac and your iCloud devices is not checked.