BootCamp fails to start after upgrade to MacOS Sierra 10.12.1

Hi guys, after weeks of waiting... BOOTCAMP IS WORKING after macOS Sierra 10.12.2 Update!

Previously i always had the ACPI.sys error when booting up windows 10, after updating the macOS, boot up your windows and wait for it to repair, trust me it will not loop anymore 😉

thank you apple for the fix 🙂 ✅

cant see any update to 10.12.2 yet

Hi - so are people saying that if

1) I have an existing BROKEN Bootcamp install

2) I update to 10.12.2

3) Reboot

I can then reboot into Windows 10 without errors?

Currently downloading 10.12.2 :-)

Did you re-enable the BT UART device? Some users had it disabled as suggested (see this Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1 ).

The Truth is out there guys!!

Installed update, rebooted into Windows, boot failed.

Shutdown, boot back into Sierra and then reboot again.

This time Windows 10 started successfully.

Now have to run Windows Update and Apple Software Update.

Thanks to all those who attempted to help and put pressure on Apple to fix!!

seriously how to update to 10.12.2? I cant find any update in app store.

Are you using the betas? I have it listed in my App Store app in the Updates tab.

Hi Guys,

Thanks for the updates. The 10.12.2 works for me.

As mentioned previously, I've rebuilt my 2015MB12. I skipped NOT install the Bootcamp Bluetooth drivers while installing the Win10 1607. Then I can use BT Win10 for weeks without any issue.

Right NOW, I ONLY launched App Store in macOS 10.12.1 and go to Sierra. I can see 10.12.2 is available (I tried Hong Kong and Canada regions). I just downloaded and installed the 10.12.2 on my 2015MB12 and restart automatically.

Checked macOS is already 10.12.2, launched Bootcamp and downloaded BC drivers (saved in USB flash). Rebooted to load BC Win10, checked the BC Broadcom folder of 10.12.2 and 10.12.1, found the packages size are the same, package info are the same, the signature are the same. Then I run and install the Broadcom Bluetooth, The Win10 Device Manager show the Bluetooth installed properly.

Rebooted to load BC Win10 again, NORMAL. Run couples of software and browse Internet, no different. Tested Bluetooth mouse, works. Rebooted again and again for 5 more times, everything resumed normal. Great!

In addition, I also upgraded my 2016MB12 to 10.12.2, also everything normal.

The same here.

I used Win10 (1607) under Bootcamp 10.12.1 by having disabled "Intel Serial IO UART Host Controller"

Just updated to macOS Sierra 10.12.2 and booted into Win10, enabled the "Intel Serial IO UART Host Controller" again, and it works.

Seems you don't have to install any new drivers on the Windows side. I assume 10.12.2 fixed the issue in the UEFI (formerly known as BIOS)

Agreed with you. Per my IT experiences, I already suspected in early stage that the problem was due to Sierra 10.12.1 updates. After read many users' complains, combine with their senerios and my extra tests on rebuilds. I already concluded that there is new bugs added in Sierra 10.12.1, but some senior level guys in this thread still keeps "advise" people to uninstall, load other version drivers, export log reports, even rebuild BC Win, etc., but not solution. Just wasting our times!

There is no solution at all, but only workaround - either disable the Intel Serial IO UART Host Controller, or skip not install the Broadcom Bluetooth driver. However, there is no Bluetooth devices can be used.

Now, with the newest 10.12.2, I can use BT keyboard & mouse, headphone, and share photos from mobile phone.

I have a simillar problem trying to run the latest Windows 10 on a 15" Retina MacBook Pro (2012).

Yeah I know it's probably "old" already, but Windows used to run just fine, then I temporarily got rid of it because I needed more space on the Mac partition. Installed Windows again after the last macOS Sierra update. Windows installs and runs but when I try to install BootCamp drivers it pops up the BSOD with a KeyMagic.sys, Stop Code: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED. and then restarts. Tried reinstalling Windows, redownloading drivers through BootCamp assistant. Also tried installing drivers one by one from the BootCamp folder. Everything seems to work except for the keyboard, trackpad and sound drivers. Any attempt at making it work results in the KeyMagic.sys related error. Any advice would be greatly appreciated!

Please start a new discussion. Your problem is from a different driver. Please specify the version of OS X and Windows ISO you are using.

Hi guys, I have a MB 2015 and I have updated to 10.12.2. I installed a new version of Windows 10 with Boot camp. After installing Bluetooth Driver exact the same behaviour as before. Can anyone confirm that a fresh install of windows 10 on a MB 2015 with 10.12.2. works?

I have solved previously the problem with disabling the bluetooth drivers. Per your sugesstions I have updated to 10.12.2 and then I reenabled to UART controller and I am back at the boot-reboot cycle! It does not work!

I had the same issue. And then suddenly an icloud window popped up saying -> WLAN update for Icloud 6.1, after installing it worked.