virtualbox.org

Hello everybody,

my MAC OS X Mountain Lion 10.8 freezes after a few minutes/seconds, when I run Windows 7 and Ubuntu guests in Vbox 4.2.12 (or other versions) at the same time.
If I run only one guest, everything is fine.

What can be a reason for this behaviour?

Regards,
Ralf

Most likely reason is that don't have enough RAM or CPU cores to run the host plus those two other PCs simultaneously on the same hardware.

Thank you very much! I will try that!