Post date: Jun 21, 2014 6:08:18 PM
So, you have an OS-X VM running on ESXi on a MAC mini and you want to boot it into single user mode?
Your PC keyboard and standard CMD+S or Option+S not working for you?
Open the EFI Shell (delete/space at boot, Boot Manager)
Select your partition and run the boot.efi with the -s, -v option or any other boot options you wanted...
fs1:
cd System\Library\CoreServices\
boot.efi -s