On my old machine I knew than, once bootcamp is installed under windows, I am able to see and read files from Mac partition when booted into windows. This no longer seems to be the case. I can see Win partition from OS X and read files from it, but not the other way around. Run command line 'diskpart', 'list volume', shows that the mac hfs+ partition was not mounted. While 'select disk 0', then 'list partition' will find presence of the partition. Option 2 ext2fsd will run, but after rebooting windows 10, windows will run scanning and repairing drive C. Download Boot Camp Windows Drivers. We only need Boot Camp Assistant for its ability to download all of the Windows drivers we’ll need to ensure the install of Windows will run correctly on Mac hardware. We won’t be using Boot Camp Assistant to partition a drive or step us through the install process. If you wish to have access again to your Mac OS partition via Bootcamp without installing third party apps, you will have to switch from Core Storage back to HFS+. The process is pretty simple without loss of data but just create a backup should in case.
Boot Camp Control Panel User Guide
After you use Boot Camp Assistant to install Windows on your Intel-based Mac, you can set the default operating system to either macOS or Windows. The default operating system is the one you want to use when you turn on or restart your Mac.
Remove Boot Camp Partition Mac
Set the default operating system
In Windows on your Mac, click in the right side of the taskbar, click the Boot Camp icon , then choose Boot Camp Control Panel.
If a User Account Control dialog appears, click Yes.
Select the startup disk that has the default operating system you want to use.
If you want to start up using the default operating system now, click Restart. Otherwise, click OK.
You can’t change your startup volume to an external drive while you’re using Windows.
To learn how to change the default operating system using macOS, see Get started with Boot Camp.
Restart in macOS
In Windows on your Mac, do one of the following:
Restart using Startup Manager: Restart your Mac, then immediately press and hold the Option key. When the Startup Manager window appears, release the Option key, select your macOS startup disk, then press Return.
If you’re using a Mac notebook computer with an external keyboard, make sure you press and hold the Option key on the built-in keyboard.
Restart using Boot Camp Control Panel: Click in the right side of the taskbar, click the Boot Camp icon , then choose Restart in macOS.
This also sets the default operating system to macOS.
For more information about restarting in macOS, see the Apple Support article Restart your Mac in macOS or Windows.