On a non-accelerated 68000 - based Macintosh (Plus, SE, Classic, PowerBook), the system will crash when showing the Info window for a selected object in a document that has more than 10 layers.
The workaround is to disable the Layer info checkbox in the Object data item in the preferences dialog.
The system will also crash under the same circumstances if you try to export (save) the object data. There is no workaround for this.
This affects all 2.0 versions of Claris CAD