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User profile for user: elmerlang
elmerlang Author
User level: Level 1
32 points

In Yosemite partition, the Mojave partition is unmounted and called DiskOs2. Can Disk Utility mount it?

Hi


On my mid-2015 15" MBP, I recently upgraded to Mojave and created a Yosemite partition to give certain apps functionality.


In the Yosemite partition, the Mojave partition appears unmounted and called DiskOs2.


Can Disk Utility mount it without risk of causing problems?


Would I then be able to see and use Mojave's contents (pics, texts) the same way when in Mojave I can see and use Yosemite's contents?


best

elmer



MacBook Pro

Posted on Sep 25, 2019 7:34 PM

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User profile for user: HWTech
HWTech
User level: Level 9
56,228 points

Posted on Sep 25, 2019 8:25 PM

If the Mojave partition is using the APFS file system, then Yosemite will be unable to mount the Mojave volume since Yosemite does not have APFS support.


If you want to share items, then a better option would be to install Yosemite into a Virtual Machine. Virtual Box is free and I believe will work. You should be able to configure the VM to allow access to Mojave's files and folders.

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User profile for user: HWTech
HWTech
User level: Level 9
56,228 points

Sep 25, 2019 8:25 PM in response to elmerlang

If the Mojave partition is using the APFS file system, then Yosemite will be unable to mount the Mojave volume since Yosemite does not have APFS support.


If you want to share items, then a better option would be to install Yosemite into a Virtual Machine. Virtual Box is free and I believe will work. You should be able to configure the VM to allow access to Mojave's files and folders.

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User profile for user: Eau Rouge
Eau Rouge
User level: Level 8
42,554 points

Sep 25, 2019 9:31 PM in response to elmerlang

The Yosemite partition cannot see or read another partition that is formatted as APFS.

To boot from Yosemite to Mojave Restart your Mac whilst holding and pressing the option/ alt key

After a couple of minutes you will see the Startup Manager where you will see all the bootable disks

available, select your Mojave disk/ partition and press Return. Your Mac will now boot into Mojave.

If you want to boot back to Yosemite then you can use System Preferences> Startup Disk.

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In Yosemite partition, the Mojave partition is unmounted and called DiskOs2. Can Disk Utility mount it?

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