These troubleshooting steps goe 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 Mac OS
Apple is regularly improving the way Mac OS handles Bluetooth devices.
Click here for instructions on how to update Mac OS.
Make sure you have the right Bluetooth parameters
Navigate to the Bluetooth preference pane in System Preferences:
- Go to Apple Menu > System Preferences > Bluetooth
- Make sure that Bluetooth is turned On.
- In the bottom-right corner of the Bluetooth Preference window, click Advanced.
4.Make sure all three options are checked:
Open Bluetooth Setup Assistant at startup if no keyboard is detected
Open Bluetooth Setup Assistant at startup if no mouse or track pad is detected
Allow Bluetooth devices to wake this computer
NOTE: These options ensure that Bluetooth-enabled devices can wake your Mac and that the OS X Bluetooth Setup Assistant will launch if a Bluetooth keyboard, mouse or track pad is not detected as connected to your Mac.
5.Click OK.
Restart the Mac Bluetooth Connection on your Mac
1.Navigate to the Bluetooth preference pane in System Preferences:
2.Go to Apple Menu > System Preferences > Bluetooth
3.Click Turn Bluetooth Off.
4.Wait a few seconds, and then click Turn Bluetooth On.
5.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 https://support.logitech.com/article/Connect-your-Logitech-Bluetooth-device#mac_osx similar re-pair to other devices.
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 Handoff is unchecked.
Reset the Mac’s Bluetooth settings
WARNING: This will reset your Mac, and cause it to forget all of the Bluetooth devices you have ever used. You will need to re-configure each device.
1.Make sure Bluetooth is enabled and that you can see the Bluetooth icon in the Mac Menu Bar at the top of the screen. (You'll need to check the box Show Bluetooth in menu bar in the Bluetooth preferences).
2.Hold down the Shift and Option keys, and then click the Bluetooth icon in the Mac Menu Bar.
3.The Bluetooth menu will appear, and you will see additional hidden items in the drop-down menu. Select Debug and then Remove all devices. This clears the Bluetooth device table and you'll then need to reset the Bluetooth system.
4.Hold down the Shift and Option keys again, click on the Bluetooth menu and select Debug > Reset the Bluetooth Module.
5.You will now need to repair all your Bluetooth devices following standard Bluetooth pairing procedures.
Re connect keyboard
Open System Preferences and click Bluetooth.
Select the device you want to connect to from the Devices list and click Pair.
Follow the onscreen instructions to finish pairing.
Upon pairing, the LED light on your keyboard device stops blinking and glows steady for 5 seconds. The light then turns off to save energy.