Apple is working on a 15-inch ultra-portable notebook following the success of the refreshed MacBook Air series, according to reports.
MacRumors claims it has learned that the new super-slim model is in the final stages of testing at Apple, but won't be launched in the immediate future.
A further report from TUAW suggests it will be part of the high-end Pro series and that a 17-inch compatriot is also in the works.
Apple has seen a renewed interest in the ultra-portable market since it revamped the MacBook Air line last year and gave it a new, much-more-reasonable price point of £849.
The MacBook Air which was refreshed again last week with Sandy Bridge processors, a backlit keyboard and the Thunderbolt I/O tech.
The release saw the original white MacBook disappear from general sale, meaning the 11-inch Air is now Apple's entry model notebook.