Hi, I just switched to Mac. I really like my Mac but there is some problems with it. First, sometimes pinch-to-zoom stops working. All other gestures work perfectly but just pinch-to-zoom sometimes stops and it doesn't work in any apps. Second, sometimes when I am connected to WiFi, my Mac stops being connected to the router. I have to turn on and off the WiFi to make it working again. How can I solve these problems? Thank you!