Anyway, the great news is that with macaron the first trouble shooting tip is to AGE your egg-whites. Yes, ladies we definitely don't have to worry about botox, plastic surgery or moisture creams here... we want those egg whites to lose some elasticity and dehydrate. If we did this to ourselves however, we'd end up looking like prunes and this is definitely not a good look.
The reason we age the egg whites is to remove moisture to produce a more stable macaron with a smooth shell. Aged egg whites are more tolerant and more difficult to over beat which means goodness especially when you're starting out and still learning. If you happen to over beat your egg whites they become grainy and the water molecules disassociate from the albumen - if this happens throw your egg whites out and start again.