The Apple rumor mill has certainly been heating up over the last few days. A few days ago we heard about a possible new 15.4 inch MacBook model to be introduced during the 2nd quarter of this year. Now, the latest rumor has Apple re-entering the sub-notebook model with a new ultraportable MacBook system.

According to the folks at AppleInsider, the new ultraportable MacBook notebook could possibly come out by midyear when the next Apple WWDC takes place. No real word on the actual specs but rumors have it that the new MacBooks may lack optical drives and will feature NAND flash memory which will speed up boot times and improve power efficiencies.

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