in Parallels Desktop Version 11.0.1 (31277) the default is to disable the efi boot (see the xml in config.vps file inside the vm package)
<Bios dyn_lists="">
<EfiEnabled>0</EfiEnabled>
</Bios>
you could try to place in the boot menu vm.bios.efi=0 or vm.bios.efi=1
use the vm configure menu >> the tab hardware >> select boot order >> Advanced Settings.
In my case the file system check (I tried to upgrade from a vm based on 10.10.5 recovery disk)
is stil detecting the VM hdd as corrupted.
using the GM did not work either, it doesn't contain a bootable partition or is not compatible with latest Parallels Desktop.
I only succeeded on using the Developer Beta.
Last edited: Sep 15, 2015