Apple’s newly updated Thunderbolt MacBook Air has reportedly been sold out in some stores, as the thin notebook has been in high demand.

“Our checks indicate demand for the new MacBook Air has been very strong thus far in the U.S. and we believe there have even been instances of temporary stock outs of certain models at some locations,” analyst Brian White with Ticonderoga Securities.

The thin and light MacBook Air introduced in 2008 has been upgraded a couple of times and according to Brian White it “has truly redefined the laptop computing market, in our view, and we expect this momentum to continue."

Two weeks back, Apple had stopped selling the white, plastic MacBook at retail and had taken a strong move by pricing the MacBook Air at $999 at an entry level notebook.

The new MacBook Air, released last month comes with Intel’s latest Sandy Bridge processor, ultra portable with Thunderbolt ports and backlit keyboard.