Furthermore, the port supports the so called 'Alternate Mode' for the parallel transmission of USB and video signals with the simultaneous power supply of the notebook with up to 100 Watts (the MacBook, however, is only shipped with a 29-Watt power adaptor). 1) that can be used in both directions thanks to the symmetrical construction. Hardly any detail of the new MacBook was discussed as controversially over the last weeks as Apple’s decision to integrate just one USB port besides the mandatory headset port (3.5 millimeter stereo jack), more precisely a highly modern type C port according to the standard USB 3.1 (Gen.