Hi Brad,

Indeed, we missed to add close glyph to this button for MacOS skin.
We will fixed for the next service pack.
Thanks for notice it.

Best Regards,
Nevron Support Team

I've been using the MacOS skin and I noticed that the Close button is blank in tabbed MDI dock manager.  I've attached a screen shot.  I'm using the 11.1.17.12 build.  The other skins have an X on the button.  When hoving over it the button turns blue and still no X shows.  This seems inconsistent elsewhere.  Is this a bug?