The first time I logged in to the Windows, I checked the Device Manager, both mouse and keyboard were installed under the Bluetooth, all the bluetooth devices reported fine, the mouse and keyboard were paired under the Bluetooth configuration but nothing of them worked.

I cannot remove unpaired them somehow, I try to turn off the Bluetooth but once it is turned off, I cannot turn it back on again.

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I then logged on back to macOS, the mouse and keyboard worked fine, I unpaired them from Mac and booted to Windows, paired them on Windows, it worked.

I then booted back to the Mac side and paired them, it also worked on Mac but once I booted to Windows, it stopped working again.

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Tried reset SMC, reinstalling both Windows and macOS or tried to manually install the Windows driver from Boot Camp support software did not help (the Broadcom driver was installed but Windows could not start the device, they only work with the Windows default drivers) did not help.

For the Broadcom Network adapter, I will check it tonight, thanks for response.

As I use macOS most of the time, every time I switch to Windows by restarting, rather than cold start, if I cold start (shutting down first) the Mac to Windows, I can use my bluetooth mouse and keyboard without issue; if I restart my Mac to Windows, they will not be functioning on Windows.

On the Mac side, no matter how I restart my Mac from Windows or Mac, the bluetooth mouse and keyboard are working fine.

I think that this power option thing was fixed in the previous Windows update, so I enabled it back as it makes no difference in my issue.

It used to work, but I think (I could be wrong here) there was an EFI update or something when Mojave came out that killed Bluetooth in Windows.

Thankfully theres a fix I just discovered today and it only costs 20: -Go to your local Best Buy and get a USB-Bluetooth dongle.

The one I found is from Insignia and it supports Bluetooth 4.0.

I plugged it in, Windows installed it, rebooted and now I can pair my Magic Trackpad 2 without a hitch.

Its USB-A so youll need a hub or adapter for use in modern Macbook Pros.

Only downside is your devices will only be tethered to Windows.

You wont be able to go back and forth between Windows and macOS without disconnectingrepairing.

I have both Magic Trackpads 12 so that isnt an issue for me -- I can use one for Windows and another for Mac, but it could be a problem for other people.

This method pairs your devices to the BT Radio on the USB dongle, not the Windows OS.

If you have the Lightning cable for the MT2MK2, you can directly connect it to the Mac and use it as a standard USB HID, instead of the 20 spent at BB.

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