The fingerprint reader is one of the smallest improvements to Apple’s all new MacBook. and the base 15-inch model ($2399) of the new MacBook Pro with Touch Bar and, already, switching back to a Mac. Apple has finally announced a refresh for the MacBook Air and here are the full details. The all-new MacBook Air with Retina. (RTTNews) – Apple Inc. (AAPL) introduced a new MacBook Air with 13-inch Retina…