I started to have problem with the tools icons, that I could not select any when the tool icon folded out, it stay selectec always the first tool. I sorted it setting the doc to autohide. For reasons I donīt know, when the doc was visible (I had mine on the bottom of the screens) the tools icon could not be selected positioning the cursor on top of it.
The problem happened in TCad ori 10 Mac and ViaCad Pro 11 mac.
I hope this helps.