According to market research company NPD, Apple's MacBook Air dominates the thin and light notebooks market in the U.S., and given the good reception of recently introduced new models, even in the near future, this situation is unlikely to change significantly.

Shortly after the newest version of Apple's OS X operating system, Mountain Lion, became available Apple's support forum became swarmed with angry users complaining about shorter battery life. The claims came in after they upgraded to Mountain Lion. The latest version of OS X  was released on  July 25th, but it didnt take long before its first flaws came to the surface. Forum thread's about this problem has reached 34,200 views and is around 40 pages long. This would seem to show that the problem is very common. User jpengland96 first reported the issue saying: “I upgraded to mountail Lion and now my battery life is about half of what it was before upgrading. Shouldn't the update improve battery life? Also, what can I do about this?”.