New 21.5-inch Retina 4K models expected.
New Apple MacBook on Tuesday? GMA X3100?
This confirms previous rumors from ThinkSecret that Apple would introduce a new MacBook by "the first half of November". Sadly, few details on the upcoming machines are presently available.
Apple's Leopard update, however, has revealed drivers for the newer Intel GMA X3100 integrated graphics chip. This is the successor to the Intel GMA 950 which currently resides in the existing MacBooks. This would suggest that the next MacBook will see an upgrade to the Santa Rosa chipset. This, however, remains speculative. The driver, however, appears functional and works when used on a PC laptop with the X3100 chipset.
The MacBook was last updated in May of 2007.