Nostalrius Begins - Quality wow vanilla realm (1.12)

I tried to replicate a macro that worked in retail.

/cast [mod:shift] Renew; Lesser Heal

So that I can make my F key both of those healing spells for on the fly healing. I've tried changing it to modifier, making sure shift f isn't key bound, and a different assortment of things. Nothing seems to work.

Please help me.

/run if IsShiftKeyDown() then CastSpellByName("Renew") else CastSpellByName("Lesser Heal") end

not sure how your macro(retail macro syntax) works - but I assume it's like this:
if shiftkey is pressed you cast renew, if not lesser heal

Awesome, it works. Thank you very much.