Apple today announced that it has released new 12-inch MacBook models with the latest sixth-generation Skylake dual-core Intel Core M processors up to 1.3 GHz, new Intel HD Graphics 515 that deliver up to 25% faster performance, faster flash storage, an additional hour of battery life, and faster 1866 MHz memory.
The notebook retains the same physical components, including a single USB-C port, Force Touch trackpad, and full-sized keyboard in a design that remains 2 pounds and 13.1 mm thin.

The refreshed 12-inch MacBook models are available through Apple’s online store starting today, and can be purchased at Apple retail stores and select Apple Authorized Resellers starting tomorrow.
Apple also today made 8GB of memory standard across all configurations of the 13-inch MacBook Air.
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Source: MAC ROUMORS