Update your iMac Pro for improved compatibility in Boot Camp
If you run Boot Camp on your iMac Pro, use Apple Software Update in Windows to install iMac Pro Update for Boot Camp.
iMac Pro Update for Boot Camp improves the compatibility of iMac Pro with Apple mice, keyboards, and trackpads when running Windows 10 through Boot Camp.
Additionally, iMac Pro Update for Boot Camp addresses these compatibility issues on iMac Pro computers running macOS High Sierra 10.13.6:
Problems switching from Windows to macOS using the Apple System Tray
Apple Control Panel not launching from the Apple System Tray
Custom keys for adjusting brightness, volume, and media playback not working
Missing indicators when pairing Bluetooth devices
Start your iMac Pro in Windows, then use Apple Software Update to install iMac Pro Update for Boot Camp and any other available updates.
Contact the vendor for additional information.