Mac OS edit plist file for 3rd party app

Anyone have an example action that illustrates how to add/change/delete plist entries on the Mac for 3rd party applications? I’m told the default write command only supports editing plist files provided by Apple. Thanks in advance.

If not already done, take a look at this post: Writing to plist file
Not sure it is abbplicable for 3rd party applications. You could give it a try.

Also, note athat most recent apple versions have changed the “system integrity protection” which don’t allow to change plist files. In that case you have to bypass it.