How to Fix Bluetooth Battery Level Unknown in macOS Tahoe 26.2
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.
Start with Fix 1: Reset the Bluetooth Property List. If the issue persists after that, try Fix 2: Re-pair with "Forget Device". Full Terminal commands and step-by-step instructions are in each section below.
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.
Recommended Troubleshooting Tool
Before proceeding with manual fixes, we recommend using OnyX. The preferred tool for deep system maintenance and resetting the macOS Bluetooth stack.
Fix 1: Reset the Bluetooth Property List
- Open Finder and press Cmd+Shift+G.
- Go to
/Library/Preferences/. - Locate
com.apple.Bluetooth.plistand move it to the Trash. - Open Terminal and run
sudo pkill bluetoothd. - Restart your Mac.
Fix 2: Re-pair with "Forget Device"
- Go to System Settings > Bluetooth.
- Click the 'i' icon next to the affected device and select Forget This Device.
- 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.