Windows 10 Anniversary + Boot Camp = no longer mounting Mac partition

Please check C:\Windows\System32\Drivers\AppleHFS.sys and AppleMNT.sys. It has not been removed, but does not function properly.

The 2 HFS/HFS+ drivers themselves do not show up in Programs and Features; they're just installed as part of the whole BootCamp.msi package installation (the Microsoft Installer (MSI) file is found in \WindowsSupport\BootCamp\Drivers\Apple\BootCamp.msi).

After you have applied the KB3176934 update in Win 10, you have 2 options:

1) In the Programs and Features control panel right click on the BootCamp software and pick "Repair" (or Change > Repair) or

2) (I think the better option) have a *recent* copy of the WindowsSupport package downloaded from BootCamp Assistant while in Mac OS X, then once back in Windows 10 right click on the \WindowsSupport\BootCamp\Setup.exe executable > select Run as administrator > Reboot when prompted.

That should re-register the drivers in Windows and if this update is the one that fixes the issue, that "should" do the trick...

Has W10 been rebooted at least once after the new W10 patches?

Tried that, not working for me still

Is "that" rebooting, or reinstalling the latest WindowsSupport package? If you applied the Windows patch and then reinstalled the Boot Camp drivers, then this is probably not the patch we're waiting for...

I installed the patch and reinstalled the WindowsSupport Package and rebooted.

Another week, another update...

https://support.microsoft.com/en-us/kb/3176938

Looks even less promising than KB3176934.

I have decided to stick to 1511_2. The constant updates and breaking of working features is annoyance enough.

I have a 12 inch Retina Macbook that has Windows 10 build 1511 on it, and I can't see my mac partitions. I think this is because the SSD on the macbook was configured with core storage, which the bootcamp NTSF drivers don't support

I have a 5K iMac that doesn't have core storage, and I can see my Mac partitions just fine in bootcamp.

To check if your drive is partitioned under core storage go to Terminal and type "diskutil cs list". If it says "No CoreStorage logical volume groups found", then you don't have core storage.

Just wondering, is apple not enabling CoreStorage on all their new macs? Are all the iMac 5K configured with core storage off, but Retina Macbooks come with it on for some reason?

CS is the default beginning with Yosemite. It is mandatory if you use FileVault2 or have a Fusion drive. If you do not use FV2, and your CS is revertible, you can revert to HFS+ which will be visible and read-only on the Windows side.

September 13, 2016 update:

KB3189866 is out, bringing Windows 10 up to build 14393.187

https://support.microsoft.com/en-us/kb/3189866

The Knowledge Base article states "Windows 10 updates are cumulative. Therefore, this package contains all previously released fixes." but it looks just as crappy as the previous updates, at least as far as this partition issue is concerned...

Maybe there is hope on the horizon:

http://answers.microsoft.com/en-us/windows/forum/windows_10-files/partitions-may -be-missing-after-installing-the/ffafb34…

Just trying to get my head round this issue. I have Windows 10 installed on my iMac 5K's (late 2015) fusion drive. If I let it update to the Anniversary Edition, will it actually damage the Mac OS partitions on the fusion drive or is this just an issue with accessing the Mac OS partition(s) from Windows 10?

Thanks in advance...