Think Secret believes Apple is set to introduce updated MacBook laptops following the release of Mac OS X 10.5 Leopard later this month, sources report. With Leopard on track to hit stores October 26, the updated MacBooks could be consumer hands by the first half of November, if not sooner.

Sources believe the MacBook update will not be too substantial, instead mirroring a similar speed bump the systems received last November ahead of the holiday buying season. It is unclear at this time whether this means the MacBook will maintain its current architecture and receive faster processors, from the current 2.0/2.16GHz configurations to 2.16/2.33GHz, or whether it will adopt the newer Santa Rosa architecture that the MacBook Pro gained earlier this year.

They also believe that Apple is not expected to update the MacBook Pro before the end of the year, and sources at this time don’t expect any other Mac hardware to see a revision before the holidays.