Apple introduced additional security features in MacOSX 10.13 that affected the installation of system (kernel) extensions - commonly known as a kext.

To cater for this we had to make changes to the UPDD kext file and our installer. These changes are in UPDD V6 version 310 and above. Earlier versions will not work in 10.13. The updated kext file is now installed in 10.9 thru' 10.13. Only 10.7 and 10.8 use the old kext file.

For earlier versions running in 10.13.x you may be able to allow them to continue to work by running the command "csrutil enable --without kext"

csrutil is a utility that can enable and disable macOS security features, including system integrity protection. Usually it can only be used in the system recovery environment.

"csrutil enable --without kext" disables the kext signing requirement (and we think also the kext approval process introduced in macOS 10.13) so this can help if you are having trouble getting the driver to load.

However, note that it's not encouraged by Apple for users to put their system in a state and they consider it an unsupported configuration so use with caution / as a last resort.