BootCamp fails to start after upgrade to MacOS Sierra 10.12.1

Yes, indeed this worked. You don't have to delete the bootcamp partition nor re-install Windows 10.

I summarize what I did

1) Boot into Windows Safe mode

To display the start menu, where you can select the Windows boot option "Safe Mode", you have to press

the function key "F8" during Windows boot. On my MacBook, I had to plug in an USB keyboard,

as "F8" (internal keyboard) seemed not to work

2) When in Windows 10, open the Device Manager. You find it under Control panel / System / Info

3) Select "System Devices" and disable the driver "Intel(R) Serial IO UART Host Controller"

4) Reboot Windows

So I bought a MacBook Air last November. Now I need Windows in order to use a certain program for work. My work suggested installing Windows using Boot Camp. I was on El Capitan and tried to install Boot Camp and it wouldn't work. I went to an Apple Store and an associated tried 2 different ways- both didn't work. Finally he said my last option was to wipe my laptop and install Yosemite and it should work. He said that he had to do that for another customer and it worked. After wiping my laptop he found out my laptop was too new and he couldn't get Yosemite. He updated my laptop to Sierra and it still didn't work. Another Apple associate did some research and said that there is something not working with Boot Camp on El Capitan and Sierra and as of now there is not yet a fix. His suggestion to me was to get Parallels- however that's $99/year. I'm guessing since I can't wait for a fix due to work I may just sell my MacBook and buy a PC. It's unfortunate.

Please start a new discussion because it is unrelated to OP and will confuse other readers. Please state the year/model of the MBA on the new discussion and the version of Windows you want to install.

This is my working Boot Camp setup

- MacBook (Retina, 12", early 2015)

- macOS Sierra 10.12.1

- Windows 10 Home (version 1607, 64-Bit, "Serial IO UART Host Controller" deactivated)

Sadly Sierra macOS 10.12.2 Public Beta doesn't fix either. Reinstalling Windows and repartitioned so many times now I have to do a full restore to fix drive errors. Surface Pro 4 is becoming more tempting as we could be waiting a while for this bootcamp issue to be fixed on the MacBook 12 2015 :(

Did you try the workaround mentioned a few posts above? It's a workaround and not a fix as Bluetooth doesn't work under Windows, but at least Windows boots and works.

Hi, I have a 2016 Retina Macbook 12 inch and have a similar issue. I can boot into bootcamp windows 10 build 1607 just fine, but in device manager the device "Broadcom Serial Bus Driver over UART Bus Enumerator" isn't working and has an error message that the device cannot start. I no longer have bluetooth in windows 10 working, it doesn't show up in device manager. I've tried reinstalling the driver through bootcamp after uninstalling the device but I can't get it to work

Consider yourself 'lucky' as your W10 installation is not constantly crashing as others have pointed out? If it does, use the work around that GrandSwiss has documented.

I have the booting issue with the new macbook (got it 2015 summer), I updated to sierra yesterday and I could not boot in windows since. I've been trying the method of trying to boot into safe mode but pressing f8 would just not work. I've tried attaching 2 different USB keyboards and both didn't work. I was wondering for those of you who used the windows safemode disable bluetooth workaround how did you get in safe mode. Also what macbook did you have?

I did finally manage to boot into normal mode by holding down shift and fn and pressing f8 on the original keyboard repeatedly. Probably ran boot loop for 30 times before getting lucky. I disabled the uart driver but I did not find any bluetooth elements underneath. Infact I've never used bluetooth on this computer and I haven't found a bluetooth driver on the windows. I checked the acpi.sys version which was same as the ones mentioned on the first page. I ran a bluescreenview to check the minidump and there was two red files highlighted.

==================================================

Dump File : 110516-8484-01.dmp

Crash Time : 11/5/2016 3:34:23 PM

Bug Check String : SYSTEM_THREAD_EXCEPTION_NOT_HANDLED

Bug Check Code : 0x1000007e

Parameter 1 : ffffffff`c0000005

Parameter 2 : fffff800`2a26eed1

Parameter 3 : ffffac80`e0c2c0b8

Parameter 4 : ffffac80`e0c2b8e0

Caused By Driver : pci.sys

Caused By Address : pci.sys+650d

File Description : NT Plug and Play PCI Enumerator

Product Name : Microsoft® Windows® Operating System

Company : Microsoft Corporation

File Version : 10.0.14393.0 (rs1_release.160715-1616)

Processor : x64

Crash Address : ACPI.sys+1eed1

Stack Address 1 :

Stack Address 2 :

Stack Address 3 :

Computer Name :

Full Path : C:\WINDOWS\Minidump\110516-8484-01.dmp

Processors Count : 4

Major Version : 15

Minor Version : 14393

Dump File Size : 285,100

Dump File Time : 11/5/2016 3:36:17 PM

==================================================

==================================================

Filename : ACPI.sys

Address In Stack : ACPI.sys+74190

From Address : fffff800`2a250000

To Address : fffff800`2a303000

Size : 0x000b3000

Time Stamp : 0x578997a7

Time String : 7/15/2016 10:10:47 PM

Product Name : Microsoft® Windows® Operating System

File Description : ACPI Driver for NT

File Version : 10.0.14393.0 (rs1_release.160715-1616)

Company : Microsoft Corporation

Full Path : C:\WINDOWS\system32\drivers\ACPI.sys

==================================================

==================================================

Filename : pci.sys

Address In Stack : pci.sys+650d

From Address : fffff800`2a3c0000

To Address : fffff800`2a417000

Size : 0x00057000

Time Stamp : 0x5801a742

Time String : 10/14/2016 11:49:22 PM

Product Name : Microsoft® Windows® Operating System

File Description : NT Plug and Play PCI Enumerator

File Version : 10.0.14393.0 (rs1_release.160715-1616)

Company : Microsoft Corporation

Full Path : C:\WINDOWS\system32\drivers\pci.sys

==================================================

Hopefully this info can help someone or apple solve the problem faster.

I have this issue as well. 2015 MacBook 12" with 10.12.1 and Windows 10 Anniversary. The disable Bluetooth trick worked for me, but isn't ideal. The hardest part was finding this post!

Hi, i have exact the same issue since update to MacOS Sierra 10.12.1 ... i've tried a lot of things in the meantime, i have found now something that is working for me ... as i've read in another post concerning the bluetooth problem i do the following first:

1. Go to the Windows Service found the two services where "Bluetooth" is found in the name activate both of them and set up them to start automatically with windows
2. After that go to Device Manager and deactivate the device "Broadcom Serial Bus Driver over UART Bus Enumerator" wait for a minute or so ...
3. Now activate the Broard Serieal Bus Driver ... after a few seconds it should work correctly and you should find the bluetooth services within windows again ...
4. Problem is that this workaround just works since you restart your Macbook because after the restart you have the same problem and you have to do step 2 and 3 again ... 😟
5. The problem seems to be the booting of windows since this really bad macOS Sierra Update 10.12.1 ... so i try to configure my Windows to boot in fast mode ... because in this mode windows safes alle the settings and the bluetooth is here also after shut down and start the macbook again (except a "full" restart of the macbook) - to configure fast start option in Windows 10 you have to go to extended energy options and active the fast start ... now i can shut down Windows and after i reboot into Windows again bluetooth is running. See Picture below for fast start mode.

This is just a workaround that i can work with bluetooth under windows but i really hope Apple will fix this whole thing as fast as possible.

michael-m wrote:

The problem seems to be the booting of windows since this really bad macOS Sierra Update 10.12.1 ... so i try to configure my Windows to boot in fast mode ...

Be careful, there are known issues with Fast Start and Thunderbolt devices.

Thanks a lot for the information! I was not know anything about this issues

Boot Camp: Thunderbolt devices not recognized after Windows 8 upgrade - Apple Support refers to W8, but similar issues exist on W10.