virtualbox.org

Hallo, I have a MacPro (2006) with 32GiB of RAM, I'm using VB 4.3.10. I cannot allocate more then 3.5GiB for a single VM. I'm using 64bit guest OS.

Thanks.

It sounds like you are starting VirtualBox or 10.7 in 32bit mode.

see this... http://support.apple.com/kb/ht3773