Reinvented for the ultimate in portability the "Early 2015" MacBook models are even lighter and thinner than the smallest models from the MacBook Air series and with just one USB-C port for connectivity and a headphone jack the hardware more resembles an iPad with an attached keyboard than it resembles earlier Apple notebooks. However like the MacBook Air these MacBook models run OS X rather than the iPads iOS. The MacBook "Core M" 1.1 12-Inch (Early 2015) features a 14-nm 1.1 GHz Intel "Core M" processor (M-5Y31) with two independent processor "cores" on a single chip a 4 MB level 3 cache an "integrated" Intel HD Graphics 5300 graphics processor that shares system memory 8 GB of onboard 1600 MHz LPDDR3 SDRAM (that cannot be upgraded) and 256 GB of onboard PCIe-based flash storage (that also cannot be upgraded). This all is housed in a wafer thin (0.14-0.52 inch) 2.03 pound aluminum case offered in "traditional" silver color as well as gold (pictured) and a darker slate "Space Gray" color option. It also packs a lowly 480p FaceTime webcam a backlit full-size keyboard with a thin "butterfly mechanism" keyboard design a clever haptic-capable "Force Touch" trackpad and a beautiful 12" TFT LED-backlit active-matrix "Retina" display (2304x1440 native resolution at 226 ppi). Apple boasts that the notebook additionally uses a new "tiered" battery design to maximize space inside the chassis and delivers 9-10 hours of runtime depending on use.