I have to boot Yosemite into single user mode to run fsck. How do I get there? Cmd + S is not recognized, Boot Volumes do not shop up with Option-Key pressed...
I'm not sure whether this is described anywhere, but this can be done by specifying Parallels System Flag in the VMConfiguration-> Hardware -> Boot Order devices.mac.boot_args="-s" PS: It is also possible to specify any other boot_args like devices.mac.boot_args="-s -v"