Setting map projection on the Mac

One of the functions of JaVaWa GMTK and JaVaWa Device Manager is to adjust the projection angle of a map. However, both programs are 32-bit and therefore will not run on MacOS Catalina or newer. Users of those systems can no longer adjust the map projection angle. With the "SetProjectionAngle" program that can be downloaded below, this problem can be solved.
It requires some manual work, because you first have to find the correct parameters yourself. The procedures are different for maps installed on your Mac (gmap format) and for maps installed on your device (img format).

Maps installed on your Mac

Start Garmin MapManager, select the map and click the "Reveal in Finder" button.
Click in Finder with right button (or Ctrl + click) on the map and choose "Show Package Contents".
Open Info.xml with a text editor. This contains the required parameters, Family ID and Product ID. The Family ID is indicated with the top red frame, the Product ID with the bottom red frame. Write down these two numbers.
Now determine the desired latitude. This is a positive integer between 5 and 85 (the number applies to both the northern and southern hemisphere)
Make sure that BaseCamp is closed!
Start the SetProjectionAngle program and enter successfully the numbers for Family ID, Product ID and latitude.
The projection angle is now adjusted, check this with BaseCamp.

Maps installed on your device

Download the Mac version of the program IMGinfo and unzip it. This program can be found on the page Tools for advanced users.
Start IMGinfo and drag the file you want the info from to the program window. Note: this will not work with devices that need Android File Transfer to access them; copy the img file to your Mac first.
When IMGinfo has finished reading the file several data will be shown. One of the items is the "Card Product ID"; copy that number.
Now determine the desired latitude. This is a positive integer between 5 and 85 (the number applies to both the northern and southern hemisphere)
Make sure that BaseCamp is closed!
Start the SetProjectionAngle program and enter the numbers for Card Product ID and latitude.
The projection angle is now adjusted, check this with BaseCamp.

The projection angle can be reset by entering the value -1.

Download SetProjectionAngle 0.2 for MacOS

SetProjectionAngle is a 64-bit program.