Why did Apple go from magsafe 1 to magsafe 2? A magsafe 1 hole is roughly the same size as a USB port and the magsafe 1 plug fits perfectly with room to spare even in a usb port. This means they could make the computer thinner and the plug smaller without loosing compatibility with older adapters. Because, the pros and airs still have their usb type A ports, so there is no need for the hole to get thinner. So why the switch if it is not for thinness? To make money of selling new adapters and converters?