Trying to close Rhino 5.4 for Mac with unsaved changes in GH pops up a window which allows to select the files to save. On Rhino for Windows the size of this window can be expanded to display the full file / path information. On Mac the window size can not be changed. --> even more convenient than changing the window size would be a tool-tip style message showing the full information
Thanks for reporting this. I see that too. Logged as RH-43903.
This should be fixed in the latest RhinoWIP. Hopefully the window can now be resized and you can see the path.