Trying to install the official version of macOS Sierra, released today 2016-09-20.
When I use the Parallels Wizard to create a new VM, I selected the
Install macOS Sierra.app application as listed. Next step is saving the
OS X image file.dmg file with its default name in a folder I choose. Then I get the error:
Failed to create a bootable disk image file for this version of OS X.
Running Parallels 12.0.2 on a MacBook Pro with El Capitan.
Ironically, I successfully did this same operation with the second, and last, GM seed from Apple using Parallels 12.0.1. Now, a few days later, I cannot install the official Sierra release with Parallels 12.0.2 (.2 update of Parallels is last day or two). So I suppose either (a) Apple changed something with the installer last-minute, or (b) the Parallels company changed something with this week’s new Parallels 12.0.2 update.