Apple is currently working on an update to the MacBook Air line that will feature a 15 inch version, according to a new rumour posted by TechCrunch and Digitimes.
According to TechCrunch, the company is working on a new 11.6 inch, 13.3 inch and 15 inch models, but they will be kept separate from the MacBook Pro products.
Digitimes has also reported the company is working on such a product, and will lower the price of its existing MacBook Air models before it is released.
The reports suggest Apple is trying to combat the release of ultrabooks, and also say this is associated with separate rumours that Apple is looking to make its next MacBook Pro line much thinner and lighter.