Your Mac OS guest might run unreliably with more than one virtual core. It is recommended that you power off the virtual machine, and set its number of virtual cores to one before powering it on again. If you continue, your guest might panic and you might lose data.
For the record, my guests all have more than one virtual core and they all run fine. I just hit continue and they come right up.
Is there any way for me to disable this prompt or automatically answer the question? I don't want to have to go into vSphere client just to reboot a machine. Thanks.