Dialog bug Deleting Material

Right clicking on a Material and deleting it gives me these dialog box buttons.
Version 6 WIP (6.12.18317.12076, 2018-11-13)

Yes, it seems the RhinoMessageBox is broken on the Mac. Thanks for the report.

I created a YT for it


This will be fixed in the next RhinoWIP. SorryAboutThisInADiscourseReply.

This should be fixed in the latest RhinoWIP.