Is there any command witch just run macro one time? I mean:
/targetenemy [noharm][dead]
/castsequence [mod:alt] XXXXXXXX, XXXXXXXX <==== and that last skill i would like to channel all way the end. I am useing Razer orbweaver and i spam button. It doesent matter if macro stops after doind it just one time
Thank you and sorry for bad English 
-Matt
usually, a default cast sequence macro with no reset function will do it.
by default, I mean made in the wow macro menu, not via some addon. something like /castsequence blah, blah, blah
will stop once it gets to the end but will also not move past each blah until it casts it so it can hang.
That last spell is channeled and it cancels for some reason… 
/targetenemy [noharm][dead]
/castsequence [mod:alt] Demon’s Bite, Eye Beam
Did you already tried to use “/castsequence [nochanneling]” ?
/castsequence [nochanneling] Demon’s Bite, Eye Beam this seems to work without [mod:alt] …But theres is a one problem, it doesnt matter if Demon’s Bite or Eye Beam is first at the macro it allways cast Eye Beam first and it should be Demon’s Bite because i want fury