Fix Guide: Tahoe Bluetooth "Battery Level Unknown"

Symptom: Your Bluetooth devices (Magic Mouse, AirPods, or 3rd party keyboards) connect to your Mac on Tahoe, but the battery percentage in the Menu Bar shows "Unknown" or remains stuck at a fixed number.

Why this happens

The bluetoothd daemon in Tahoe 26.2 has a bug in how it polls the Battery Service UUID from LE (Low Energy) devices, causing the reporting service to time out.

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Fix 1: Reset the Bluetooth Property List

1. Open Finder and press Cmd+Shift+G.
2. Go to /Library/Preferences/.
3. Locate com.apple.Bluetooth.plist and move it to the Trash.
4. Open Terminal and run sudo pkill bluetoothd.
5. Restart your Mac.

Fix 2: Re-pair with "Forget Device"

1. Go to System Settings > Bluetooth.
2. Click the 'i' icon next to the affected device and select Forget This Device.
3. Turn the device off and on again, then re-pair.

Recommended Tool: CleanMyMac

Persistent Bluetooth issues can be caused by conflicting launch agents. Use CleanMyMac to clean your system and manage startup items that might interfere with Bluetooth services.