Owners of Apple computers report that after updating to macOS 10.13.4, their Magic Mouse, Magic Trackpad and Magic Keyboard are not so magic anymore and don’t work in Bootcamp. Apple has not released a workaround or fix yet.
Bootcamp is Apple’s multi boot tool and allows owners of an Apple computer with an Intel CPU to install Windows alongside macOS. Update 10.13.4 of High Sierra apparently also changes something in the Bootcamp software, which in its turn, causes Bluetooth issues. Apple’s Magic Mouse, Magic Trackpad and Magic Keyboard all use Bluetooth to connect to the computer. All the input devices are made by Apple and the company has released drivers, so they can be used in Windows.
After the macOS update is applied, all the magic input devices have magically disappeared from Windows. The bug affects both Macbooks and iMacs but it appears all affected users are on Windows 10. A user reports that only his Apple Bluetooth devices disappeared from Windows and not Bluetooth devices from other manufacturers.
On Apple’s forum, users are desperately looking for a solution. Initially they suspected the culprit was an update for Windows 10. But after uninstalling several specific Windows updates, the issue was still not resolved. The only common thing appears to be the macOS update to version 10.13.4, unfortunately rolling back to 10.13.3 also didn’t fix the issue for the user that tried it.