BootCamp fails to start after upgrade to MacOS Sierra 10.12.1

1)Run BC Assistant, under Action -> Download.... Get the BC Drivers to USB drive 1.

Done

2)Mount single 64-bit ISO and copy the contents to Usb drive 2.

Wait, what now I need a second USB ?

What format?

3)Do not copy the ISO file directly to a USB.

Well I can't as this fails anyway.

4)Copy the BC drivers to the root of Usb drive 2.

Do you mean USB Drive 1? As in step 1?

With the ISO open, can you find the file which is larger than 4Gb?

To avoid confusion, you may want to start a new discussion.

RobjDerby wrote:

Why doesn't apple let you uninstall an OS 10.12.1patch ?

This issue is so frustrating, no point in doing a new Bootcamp install as the same issue will just reccur.

Apple does allow a roll back - macOS Sierra: Revert to a previous macOS version

and it has been suggested...

On Page 1 - Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1 and it works as noted in - Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1 .

On Page 3 - Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1 and as quoted in Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1

MB Retina 2015 Sierra 10.12.1 is problematic with Windows Ten.

ad nauseam ad infinitum.

This specific post Re: BootCamp fails to start after upgrade to MacOS Sierra 10.12.1 shows...

Conclusions :

OK 2015MB12 El Captiain + Bootcamp Windows 10 1607

OK 2015MB12 Sierra 10.12.0 + Bootcamp Windows 10 1607

OK 2016MB12 El Captiain + Bootcamp Windows 10 1607

OK 2016MB12 Sierra 10.12.0 + Bootcamp Windows 10 1607

... so stick to 10.12.0 on 2015/2016 MB12s.

You are more than welcome to analyze the entire discussion post-by-post, if you like.

Hi All,

I have 1 more clarification. Due to 1 of Adobe CC 2015 Win on my 2016MB12 has new updates but can't be updated with error. Also there is another unwanted software but can't be uninstalled. I decided rebuild Bootcamp Win10 (maintains the macOS no change which is 10.12.1).

Yesterday, I deleted and rebuilt BC with the same Win10 1607. Due to it is my 2016MB12, I installed the BC Bluetooth driver as usual. The BC Win10 1607 starts normal after BC drivers were installed. Then applied Windows updates which has rebooted 3 times, everything ok included Bluetooth can be used normally. Re-install MS Office, Adobe and applied all the updates & patches. The BC Win10 still load and run normally, still can use BT mouse and speakers. However, per the last week experiences, not sure when the BT will be temporary fail.

Then I rebuilt BC Win10 1607 on my older 2015MB12 (although it is just rebuilt in 2 weeks ago). Of course I skip NOT installed the BC BT driver. The BC Win10 loads and run normally, but can't use BT mouse and speakers due to didn't install BT driver.

With these extra efforts, I'm now more than 100% ensure the problem is not on Windows side. It is definitely due to the Sierra updates 10.12.1.

Tested on 10.12.2 beta 4 with my MacBook early 2016. Bluetooth is now available. I think Apple has fixed the problem. Try update to that newest beta version.

Please post the link to the release notes of 10.12.2 B4. They should be available in App Store Update list of updates applied in last 30 days. Not all users will get the B4 release. Some will need to wait for the GA release.

Thank you for informing us. Let's hope it really is a fix.

Public Beta 4 is also available on beta.apple.com

speakElvish wrote:

Public Beta 4 is also available on beta.apple.com

You do not want to mix Beta and GA releases on the same Mac. It gets very nasty, especially for testing. Most users here will be on GA releases. Beta can also break stuff. A Test Mac is a better choice for a Beta release. Also, from https://beta.apple.com/sp/betaprogram/faq ,

Is the public beta software confidential?

Yes, the public beta software is Apple confidential information. Don’t install the public beta software on any systems you don't directly control or that you share with others. Don’t blog, post screen shots, tweet, or publicly post information about the public beta software, and don't discuss the public beta software with or demonstrate it to others who are not in the Apple Beta Software Program. If Apple has publicly disclosed technical information about the public beta software, it is no longer considered confidential.
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Hi SpeakElvish: could you please open the bootcamp assistant and download the windows support software and post the Bluetooth driver here? We could exchange the BT driver within the windows support software for 10.2.1 and could run it on a GA Version, would be great. thanks!

I had the same problem go delete the Broadcom bluetgoot drivers and you can boot up but with no Bluetooth

i am new in mac. could you pls tell me step by step how to delete broadcom bluetooth?

thanks

keijiazum wrote:

could you pls tell me step by step how to delete broadcom bluetooth?

The following procedures is executed in Windows, not in OS X. (Copied from a previous post by rdragona1994)

1. Boot up into safe boot

2. Go to the device manager.

3. Switch to devices by connection and enable show hidden devices. You are looking for "Broadcom Serial Bus Driver over UART Bus Enumerator". Its parent should be not running (safe mode does this and it's why the computer should even be running now). You want to disable the parent. Should be able to run windows from here after a restart without needing a full restore.

Its quite simple go to the folder bootcamp on Windows and then go to drivers -> Broadcom and you can find it there you can also search for it in file explorer.

I would recommend however you update to mac OS 10.12.2 public beta 4 then redownload the boorcamp drivers from bootcamp assistance as the issue was fixed in the update