Level 2

256 points

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

I have a Retina MacBook Pro (Late 2013) with Mac OS El Capitan, dual-booting with Windows 10 with Boot Camp installed. Everything was working fine until I installed the Windows 10 Anniversary Update today; now Windows no longer mounts the Mac partition. I successfully reinstalled the latest Boot Camp drivers, but Windows still won't show me the Mac partition. (Booting into Mac OS works fine.)

Is anyone else seeing this problem? Anyone know of a solution or workaround?

Posted on Aug 3, 2016 6:12 PM

114 replies

Nov 30, 2016 4:03 PM in response to Loner T

Since it's working right now after that install and having other issues over the weekend, I'd rather not uninstall it. I don't mind if the install is initially necessary, as long as it keeps working even once it theoretically expires (which I won't know for another few days).

Gaffable

Level 1

21 points

Dec 3, 2016 3:50 PM in response to Brian Kendig

On my computer, the Windows Anniversary upgrade process stopped at 71% with the error message "INACCESSIBLE_BOOT_DEVICE".

Today I discovered that the cause of the problem was the software program MacDrive Pro 10. The program's publisher, Mediafour, has an explanation here.

After I upgraded my copy of MacDrive Pro to the latest version (10.2.0, available here), I was able to upgrade to Windows Anniversary without any problems.

Using MacDrive Pro 10.2.0, I am able to read and write to the macOS Sierra partition of my hard drive from the Boot Camp partition. My computer is a 2013 iMac.

Loner T

Level 9

59,536 points

Dec 3, 2016 8:42 PM in response to Gaffable

Gaffable wrote:

Using MacDrive Pro 10.2.0, I am able to read and write to the macOS Sierra partition of my hard drive from the Boot Camp partition. My computer is a 2013 iMac.

This discussion is for the Apple-provided read-only drivers which allow Windows to read HFS+ partitions. Using third-party software is not the real issue.

Dec 13, 2016 3:28 PM in response to Loner T

I've just only realized it's not only a W10-1607 problem (not mounting HFS-partitions any longer) - Apple has also abandoned its HFS-support (Sierra-Bootcamp-6.1 isn't featuring any HFS-drivers anymore).

So there's only two alternatives left in my eyes: stick with W10-1511 (which is mounting HFS) plus El-Capitan-Bootcamp-6.0 (which still contains HFS-drivers) - or get accustomed to those behated clouds 🙂

Loner T

Level 9

59,536 points

Dec 13, 2016 3:47 PM in response to rollercoasta

The other factor is CoreStorage which makes any encapsulated HFS+ inaccessible to any driver on the Windows side.

eipok

Level 1

8 points

Feb 7, 2017 2:59 PM in response to Brian Kendig

In summary, Is there any final secure workaround? Despite we have to install some 3 party software?

Thanks in advance,

Best regards

_yyylny

Level 1

8 points

Mar 4, 2017 7:58 AM in response to Andraxxus

Thanks a lot! I've been trying to fix that problem for months and your second solution worked perfectly. BTW, on my single hard-drive computer my Mac partition's volume number was 2.

Mar 12, 2017 8:33 PM in response to Andraxxus

Thanks so much dude! The registry method fixed my issue 🙂

Nicu K

Level 1

4 points

Apr 27, 2017 4:35 AM in response to Andraxxus

Worked like a charm! Used option 2 and fixed the issue in less than a minute. Thanks a lot!

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