Thank you for your answer.
I was not sure where to post on the right topic because I did not know if the problem comes from the map, the GPS or the patch. I try on the other topic.
Thank you!
So someone is able to help me?
I have a Montana 610 and tried to use the TOPO France V6 but it is not recognized. I have a message that the GPS is not able to authenticate the map.
I followed the thread to patch the firmware and especially this post because I have exactly the same problem as addi51:
GarmanNuvi wrote:addi51 wrote:Thank you for your work! The only issue left is that i can't use the WebUpdater since it hasn't been updated for OS Catalina yet and it does not support 34-Bit anymore. Guess I have to wait and see or find a PC which I could use?
You can try using an SD card to Patch.
Be sure to remove & Back up All BirdEyes images (JNX files) currently present on
your device before applying the Patch
BirdEyes images can be restored AFTER flashing new firmware
Download & copy patched GCD file to SD card as Garmin\GUPDATE.GCD
Turn on device and enter "Yes" when prompted to install new software
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But it still does not work.
Thank you in advance for the help.