MacOS and SU2018 - .plist File Access

[medeek]

I've had a number of new and existing clients who are running SU2018 on MacOS who are reporting that they are unable to save global settings for the Medeek Truss Plugin. The problem is that no one is seeing any errors generated in the ruby console so I am currently at a loss on the exact problem and how to solve it.

Has anyone seen a similar issue and have been able to resolve it?

The code to write the global settings is very simple, an example below:

# Writes Materialsoption Setting

@Materialsoption_write_result = Sketchup.write_default "MEDEEK_TRUSS_PLUGIN", "MATERIALS_OPTION", @Materialsoption_new

Why would this stop working on SU2018 running on MacOS?