#showtooltip
/cast [target=player,mod:alt] Healing Wave
/stopmacro [mod:alt]
/cast [target=mouseover,help][target=focustarget,help][target=focus,help][help] Healing Wave

will this not work the same as the above marco

#showtooltip
/cast [target=player,mod:alt] Healing Wave
/cast [target=mouseover,help][target=focustarget,help][target=focus,help][help] Healing Wave