Can my users change the start-up disk on my systems and boot from a second hard disk or removable media when the workstation is Frozen?
Yes. Please ensure that the Open Firmware Password (OFP) has been configured on your workstations. The OFP prevents users from being able to change to a different boot device or from booting from removable media. More information on the open firmware and instructions on setting the OFP can be found at: http://www.apple.com/support/downloads/openfirmwarepassword.html. Users need to set the OFP to prevent the workstation from booting from alternate disks.