Apple is reportedly working on a new, ultra-thin 15in MacBook which will be part of the MacBook Air product line.
Japanese website Macotakara claims that an inside source has confirmed that Apple has already finished development of an LCD test component for the laptop.
Currently the MacBook Air comes with either a 11.6in or 13.3in screen and don't have optical drives and use solid-state storage rather than a traditional hard disk in order to keep the chassis as light and thin as possible.
However, the report also mentions a new, 15in MacBook Pro with no optical drive that is currently in development as well.
The MacBook Pro line received an update last week, with Apple quietly upgrading the processor, graphics and HDDs of several of the MacBook Pro models while keeping the prices the same.
It has been rumoured that a more drastic update to the MacBook Pro family will come next year, while Apple is expected to utilise processors built on Intel's Ivy Bridge architecture in future models.