Macro switching with Spec change (Outland - Dual Spec)

Hello !

I need a macro that is adapting to the Specialization switching

When in Spec1 ; cast Spell1
When in Spec2; cast Spell2

On retail you can use /cast [spec:X] Spell (with X the index of the spec)
But this feature isnt implemented yet

I can find what Spec i'm using by using :
GetSpellInfo"X" (with X a spell only available in 1 spec)
But it wont really help as I cant cast any spell from script because CastSpellByName beeing protected since TBC release

Any workaround would be apreciate
**I dont want to use any LUA unlocker