Bluetooth gives you the freedom to use devices such as keyboards and headphones wirelessly, but it is not always reliable. If you encounter problems with Bluetooth in macOS, you can follow these steps to troubleshoot them.
Basic First Steps
Before you go to the Apple Store or start thinking about replacements, follow some of these more common troubleshooting steps first. Many times the most basic steps can solve a problem with the Bluetooth connection.
Checking Pairing Status
A good first step is to make sure your device is connected and properly connected to your Mac. Check by going to the Bluetooth settings menu. In the Dock, click the Start icon, and then click System Settings> Bluetooth.
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Reconnect your computer Bluetooth device
If your device is not connected to your Mac, turn off your Bluetooth device and then turn it on again to see if it reconnects. This is also a good time to check the battery level on your device as well. If it does not have enough power to operate, take the necessary steps to resolve it.
If your device has enough power but does not reconnect automatically, click the Launchpad icon on the Dock. From there, go to System Settings> Bluetooth and then click "Connect" next to your device.
If you see the Bluetooth icon in the menu bar, you can also use it to connect (or connect) your Bluetooth device.
To display the Bluetooth icon in the menu bar, select the check box next to “Show Bluetooth in the menu bar” in the Bluetooth Settings menu.
Each paired device has an entry in the Bluetooth menu on the menu bar. To disconnect the device, hover over its name, and then click "Disconnect." Click "Connect" to reconnect.
Restart your Bluetooth radio
If your device does not reconnect, you can restart the Bluetooth radio on your Mac. To do so, click the Dock Start icon and go to System Settings> Bluetooth.
Then click "Turn off Bluetooth" and then click "Turn on Bluetooth."
If enabled, you can also do this from the Bluetooth settings menu on the menu bar. Just click on the Bluetooth icon, click "Turn Bluetooth Off", and then click "Turn Bluetooth On" to restart it.
Removing your Bluetooth device  If none of the previous steps work, try removing the troublesome Bluetooth device from your Mac just before you consider more drastic steps.
To do so, click the Launchpad icon in the Dock and go to System Settings> Bluetooth. Right-click your device, and then click "Remove."
Once the device is removed, you can try to pair it again. First, however, make sure that the device is configured correctly. For example, you may need to set up a Bluetooth keyboard to get the right keys to work.
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Factory Reset All Connected Apple Devices  Apple hardware tends to work best with other Apple devices, but it does not that accessories like Airpods always work perfectly with macOS.
It may seem drastic, but you may want to consider resetting your Airpods or other Apple peripherals if you are unable to reset or stabilize your Bluetooth connection. This may be more difficult to do with an iPhone, but it is a simple process for smaller devices (like Airpods).
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Rather than performing this action for each device, you can do so on all connected Apple devices in the Bluetooth troubleshooting menu.
The Bluetooth icon must be visible in the menu bar to do this, so we start there.
Enable Bluetooth icon in the menu bar
If you do not see the Bluetooth icon in the menu bar, click the Start icon in the Dock, and then navigate to System Settings> Bluetooth.
Click the check box next to "Show Bluetooth in the menu bar" to enable it.
Enter Bluetooth troubleshooting menu and factory default Apple devices
When the Bluetooth icon is visible in the menu bar, press and hold Shift + options and click the Bluetooth icon. The Bluetooth menu appears and contains an additional "Debug" menu and other hidden connection information.
Click "Debug" and then click " Factory Reset All Connected Apple Devices. "This will only work if your Bluetooth device is currently connected to your Mac; if it is not, follow the restore instructions for that device instead.
 Accept the warning and click "OK" to start resetting all connected Apple devices.
When the factory reset process is complete on all your devices, you must reconnect them and reconnect them in the Bluetooth settings menu, either from the System Settings menu or the menu bar.
Remove all Bluetooth devices or reset the Bluetooth module
From the troubleshooting options, you can also remove all Bluetooth devices from the Bluetooth configuration or restore the macOS Bluetooth module completely.
Again, to do this, the Bluetooth icon must be visible on the menu bar. If not, click the Dock Start icon and navigate to System Preferences> Bluetooth. From there, click the checkbox next to "Show Bluetooth in the menu bar" and the icon should appear.
Press Shift + Options and click the now visible Bluetooth icon to access the troubleshooting menu.
Delete All Bluetooth Devices
In the troubleshooting menu, click "Delete All Devices" to delete all Bluetooth devices stored in macOS Bluetooth configuration.
Click "Delete" to confirm the action.
Reset the Bluetooth module
You can also reset the Bluetooth module completely from the troubleshooting menu. This will wipe the Bluetooth configuration, reset the Bluetooth hardware, and disconnect any connected Bluetooth devices.
Click "Reset Bluetooth Module" to begin.
Click "OK" to begin confirming.
When the process is complete, restart your Mac and reconnect your devices. If you are using a Bluetooth keyboard or mouse, you must reconnect them before restarting your Mac.
Check the system log
The steps above should help you solve many common problems. But if you continue to have problems, check the system log for more information.
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It can help you limit potential conflicts or problems with your Bluetooth hardware or devices. To access the log, use Spotlight.
Press Command + Space, type "Console" in the text box, and then press Enter. You can also click the Search icon in the menu bar to start Spotlight. Click the "Console" option when it appears.
Click "Reports" on the left to browse the system log. You can also type “Bluetooth” in the search bar at the top to view all relevant entries.
You cannot cure a problem directly from the system log, but it can help you diagnose a deeper problem with settings or hardware.