Quote Originally Posted by Leaibolmmai View Post
I tested the 4-maps-united-file in a GPSMAP 64st. Map did not show up in the maplist in the GPS. However: I was able to find and open the map in BaseCamp when connecting the GPS to my PC.
Quote Originally Posted by catymag View Post
If your 64 firmware is not patched you cannot use unlocked maps
Quote Originally Posted by Leaibolmmai View Post
I have been using my GPSMAP 64st right out-of-the-box-no-updates-or-modifications-done, and most unlocked maps works well on it.
I downloaded the map offered in post #6 and it is indeed not recognised in my (unpatched!) GPSmap 64s, confirmed by the error message: "Can't Authenticate Maps. Contact content seller for help.". As catymag says, you need to patch the FW (firmware) of your GPSmap 64st if you want to use this unlocked version of the map.

However...!! Although the map is already unlocked, it is not stated how it was unlocked. I re-unlocked it by using [Only registered and activated users can see links. ] and voilą: now the map is recognised by the unpatched GPSmap64s.