Cartographica supports custom line styles. To access the styles, you will need to acquire a custom line style file (.ctline) and then place it inside a special folder on your Macintosh.
Open Cartographica Application Support
In the Finder, with a window frontmost, Select Go > Go To Folder...
When the window appears, type ~/Library/Application Support/com.ClueTrust.Cartographica into the box and click Go
Locate/Create the LineStyles folder
The LineStyles folder may already exist. However, if it does not, choose File > New Folder... and type LineStyles in the box to create the LineStyles folder.
Drop the LineStyle files into the LineStyles folder
Now that you have a LineStyles folder, you can place the ClueTrust Line Style files in it and they will be available the next time you start Cartographica.