From 2006 to 2011, the MacBook was Apple's consumer laptop. It was the successor to the iBook. Its design has evolved over the years: first in polycarbonate, then "aluminum unibody" in 2008-2009, and "white unibody" (2009-2011). After a four-year hiatus, the MacBook range will reappear in 2015 in a "Retina" version until 2019. The second-hand MacBook Retina is very popular.