The MacBook series replaced the iBooks in 2006. It started with the white MacBook models A1181, some of which were also available in black. In 2008, the plastic MacBooks were replaced by an aluminum MacBook with the model number A1278 (which was later reserved for the 13-inch MacBook Pro models), to be continued in 2009 and 2010 with white A1342 models made of polycarbonate. Then it was long quiet around the MacBook series - in 2015 Apple revived the MacBook series with the 12" Retina Model A1534.