Recent changes to Garmin software:

Garmin has made several changes to their computer software programs, MapSource,
MapInstall (Mac), Roadtrip (PC and Mac), BaseCamp (PC)
We are pursuing a solution as quickly as possible.
 

PC users:

MapSource - As of 4th Feb, Garmin has released a new version of their computer software, MapSource (6.15.11) which won't allow OZtopo to be displayed or used on your PC. Later versions also suffer the same problems. An upcoming version of OZtopo will resolve this issue.

Symptoms are the maps appear locked:
        A warning message during startup may be displayed indicating OZtopo V2.1 Roads are locked
       On the map screen, bottom right hand corner under scale bar "Maps locked" may appear

If this occurs, please check the version of MapSource being used, via Help, About MapSource. If its V6.15.10 or later please down grade back to 6.15.7 via these instructions

BaseCamp - has similar problems to MapSource. The correct version for OZtopo V2.1 is V2.0.9 available from here

MAC users:
If you use a MAC you will have to use MapInstall V2.1.0 available from here

GPS Messages:
Some GPS models may display the message "Can't authenticate maps ". If so please use earlier firmware as detailed below:

Oregon V3.30 Firmware - downgrade the Oregon firmware by following the instructions here

Dakota V2.70 Firmware - downgrade the Dakota firmware by following the instructions here

Colorado V3.20 Firmware - downgrade the Colorado firmware by following the instructions here

Zumo 660 V3.50 Firmware - downgrade the Zumo firmware by following the instructions here