ok I've fixed it, it's alt+right mouse button, maybe on my imac has set keyboard like this, don't know, but the problem is solved...

thanks for not responding :-D

Oh, that :-D, i know it, but it is running better than ARMA2OA :-D.
as was saying the problem with running the game was solved by -nobenchmark command

OK, I did attach the dxdiag file, but in two days i will have new computer, so i don't know if it will help you

Thanx esas for you dugestion, i fixed ot by rining from steam with "-nobenchmark" as manager has told me... How is game runing on your computer, i should recieve almost same configuration in three days :-)

-nobenchmark has solved my problem, thank you very much :-D