hello I have a problem with SMP2 and X-Plane 10.30rc1. flight above FL100 when the weather is charging for a few seconds I hear the sound of wind or a breath. I had this problem too with SMP 1. My system is an iMac 2013 GTX 775M and i5 3.4 24GB DDR. Other than that SMP2 brings a big plus in X-Plane. Thank you