i currently have a mac os x 10.7.5 and used VirtualBoxVM to install ubuntu 13.04. i went through the whole process and the os is created, but the only problem is it needs to reboot but it stays stuck on the reboot message. it says its a broadcast message from root@ubuntu..the system is going down for reboot NOW! modem manager 1436 caught signal 15, shutting down..this message just remains and if i try shutting it down with my other os in the background, it restarts and does the same thing when i start ubuntu again. how do i get past this point to fully install ubuntu as my only OS? it gave me 2 options when installing: 1) to test ubuntu out before wiping my mac os 2) fully install and replace mac with ubuntu. i chose the second. i filled out all username, location and password info. the new os is created, the system needs to reboot now but won't like i said. apparently the virtualbox is a cd according to comments below, and to complete the process i need to eject it. how is that done? (pressing enter or any other key does not work)
I've met the same "Shutting Down" problem while installing using PD8 and here's how I solved it. Maybe VM will have some similar steps just like PD.