Hi Maxim -
I am having the same problem that you helped Jorge with, but I don't have the necessary .cui files in my applications folder in order to manually move them. How does one get those files?
You can try the solution form this place:
It is about AC 2012 and in the case described there the program terminates abnormally, but the author offers a solution to something similar to your case.
Try to download attached ZIP archive and extract Autodesk folder from this archive into /users/YOUR-USERNAME/Library folder.
The folders and files structure in attached archive is exactly the same, that should be created on the first run of AutoCAD 2013 for Mac.
But I have to say: it seems to me - definitely on your MAC is something wrong with permissions.
I'm on Autocad LT 2013 with OSX Mountain Lion
I have the same issue on screen, although all the CUI files are (and were) where they should be.
I tried to reset the tool bar (wich is empty of any icons) and it did reset the settings (Tools<Customise<Interface CUI), but not the display(Toolbar) wich is still empty.
I now lost my personal settings AND didn't get the display back What a wonderfull day !
I would be glad if anyone can help who knows what may be happening, ... before i give up and reinstall the application ! LOL
I have no idea how, but it reapeared.
I did try to quit ant relaunch before but that time was the good one.
You can still tell me if you know what was wrong with it.