@plot-paris said:

sorry Mike. I have no idea.
the only time I used a mac i was desperately trying to open the cd-drive until someone showed me, that you have your own key on the keyboard for it

It works on the Mac too OSX 10.5.4 and SU 6 but instead of using the ALT key during the move I used the up-arrow-key. With the ALT key you make a copy of the circle using the move tool on the MAC and then it dosn't work.