How to install macOS Developer Preview, Parallels 12 ("Failed to create a bootable disk image...")

The Parallels brochure page says that Parallels 12 is "Optimized and ready for macOS Sierra"
https://www.parallels.com/products/desktop/
But I cannot install the using the 'Install macOS Sierra Developer Beta.app'.

1. Launch Parallels, Version 12.0.1 (41296).
2. Choose File > New > 'Install Windows or another OS from a DVD or image file' > Continue
3. I choose "Install macOS Sierra Developer Beta.app" from the scrolling list that appears, and click Continue.
4. In the dialog informing meth that "...Parallels Desktop needs to create a bootable disk image file. ..." I click Continue.
5. In a Save As dialog that appears, I accept the default file name: "OS X image file.dmg" and click Save.
6. An error message appears: "Failed to create a bootable disk image file for this version of OS X."

 

I have a similar exp. but I am using the release version of osSierra, and I have not had a response to my request on Twitter either. What's up with that??

 

Hi Basil.Bourque,
Please create a bootable disk image for Mac OS X Sierra using Disk Maker X and let us know if that works.