Changing Bootcamp's Default Mac Bootvolume

[flyproductions]

Simple Question:
Is there any way to change the volume which is linked to the "Mac macOS" icon in the Boot Camp Control Panel in Windows?

It is linked to the main Mac boot disk i used once i installed Windows. My main Mac OS drive now has changed. But everytime, i use Windows and want to go back to Mac, it boots my old drive. So i always have to reboot again, to get into my actual working enviroment. Is there any way to (re)link this thing in Boot Camp Assistant (Windows) to the Mac Volume, i actually use?

Holding the option-key while booting is not an option for me, as i have no bootscreen-GPU. Any suggestions?

 

[DeltaMac]

So, the boot drive that you use now is probably formatted APFS - would that be correct?
Windows does not read APFS volumes natively. You will need to install some drivers to see your APFS boot drive.
(Windows sees your older Mac boot drive, because it is not APFS, correct?)
Here's one solution for that: https://www.paragon-software.com/us/home/apfs-windows/

 

[flyproductions]

So, the boot drive that you use now is probably formatted APFS - would that be correct?

Yes!

(Windows sees your older Mac boot drive, because it is not APFS, correct?)

Not quite. It is also formatted AFPS. 😟

My new drive is even named like the old one was, while the old one has another name now. It still defaults to the old one.

 

[DeltaMac]

hmm.... What happens if your older drive is not connected to your Mac?

Or --
Is there any change if you do an NVRAM reset? (I am making an assumption that you have an older intel Mac, not an AS Mac.
Is there any change if you make sure that the Mac system boot drive that you want to use to boot after using Windows is selected as the boot drive in the Mac's Startup Disk pane? You would set that while booted to the Mac system, of course.

 

[flyproductions]

hmm.... What happens if your older drive is not connected to your Mac?

Good point! That's one thing to try!

But there is also another (HFS+ journaled) backup-disk, which shows up in the control panel. Only my main drive does not. Could try disconnecting both.

Is there any change if you do an NVRAM reset?

Beside it beeing a complete mess with a Web-Driver dependent nVIDIA GPU (requiering swapping the GPU, reinstalling drivers, reswapping the GPU), it didn't change anything.

(I am making an assumption that you have an older intel Mac, not an AS Mac.

Good assumption, as there are not so many AS Macs, running native Windows.

Is there any change if you make sure that the Mac system boot drive that you want to use to boot after using Windows is selected as the boot drive in the Mac's Startup Disk pane? You would set that while booted to the Mac system, of course.

Not possible, because to get to Windows at all, i have to select that as bootdrive in Mac OS. But i could eventually try with some bootscreen GPU, getting to Win by holding the option key when booting and keeping the main drive selected in Mac OS. I'm not sure, if i did not allready try this a while ago.

 

[DeltaMac]

I think I am not on the same path that you might have to use, so I am not being as helpful as I would like.
But, one other question - What macOS version is your primary boot drive?