64bit guest vm if everything was working fine until now, suddenly no longer work.
It was run
· Mac OS X Update, (firmware update, perhaps at the same time)
· VirtualBox Update 4.1.12> 4.1.14
so now
· MacBook Air 11-inch, Mid 2011
· Mac OS X Lion 10.7.4(11E53)
· Boot Rom MBA41.0077.B0F
· SMC 1.74f1
· VirtualBox Update 4.1.14
Message that appears when you start the Virtual Machine,
MacBook Air doesn't have BIOS Setting.VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.
Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer.
Any idea what's wrong?
Thanks a lot