I'm running an OS X 10.10.5 host with Parallels 11.1.1 freshly bought and installed. When I attempt to create an OS X virtual machine, Parallels creates a bootable OSX .dmg soft disk. Several times when I tried, Parallels complained that the disk it created wasn't bootable. I deleted and re-downloaded /Applications/Install OS X El Capitan.app, and now Parallels no longer complains about the .dmg file it creates. However the VM can't boot from it. The bootloader doesn't recognize it as bootable. (I'm not 100% certain the re-download of Install OS X El Capitan.app coincided with the minor change in behavior.)
I also tried running /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia directly several times, and it failed as well.
Should i try using a USB stick instead of creating a .dmg file? (Oddly, I don't have one handy.) Should I create a partition on my disk and point createinstallmedia at that? Should I upgrade the host to 10.11.1 first? All of these strike me as unlikely to make a difference. Any other ideas?
I also tried running /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia directly several times, and it failed as well.
Should i try using a USB stick instead of creating a .dmg file? (Oddly, I don't have one handy.) Should I create a partition on my disk and point createinstallmedia at that? Should I upgrade the host to 10.11.1 first? All of these strike me as unlikely to make a difference. Any other ideas?