- Install Guest Additions Virtual Drive: Devices-> Install Guest Additions (may have to Remove Disk from Virtual Drive then repeat to get Linux to auto mount).
- su -
- yum update
- yum install dkms gcc
- cd /media/VBOXADDITIONS*
- sh ./VBoxLinuxAdditions.run
You may need to reinstall the appropriate kernel devel packge (it will tell you it can't find the correct files). And then restart the Guest machine...
Oh, and note that if you want GNOME3 to work, you need to select 3D acceleration in Virtual Box settings...
