Yes they tried. But there are also other examples. Drag&drop in general is very popular to try in several situations. Like a right klick.
No in this case is it wasn't an OS X user and the test also runs on windows. But I think the problem is the same.

I agree. All of my participants search for a long time. But also try "right click".

I think the whole actions button will be better to find at the upper line of functions.
All participants at first take a look at the upper line before search at the lower left.

I agree too. All of my participants had the same problems.