New Skylake MacBook Pros coming in the fourth quarter.
New 'Magic Mouse 2' and Apple Wireless Keyboard With Bluetooth 4.2 Appear in FCC Filings
The internals of both devices will see a notable overhaul in their Bluetooth capabilities, with each device getting a bump from Bluetooth 2.1 to Bluetooth 4.2. The upgrade will bring about Apple accessories that should see a noticeable increase in battery life and more robust communication between the input devices and the main computer.
Also of note is the inclusion of integrated lithium battery packs, which users will have to charge instead of the swapping in traditional AA batteries as seen in the current generation of the Magic Mouse and Apple wireless keyboard. The change is noticeable on the wireless keyboard in particular, with Apple able to do away with the barrel shaped feature on the bottom of the existing keyboard where the replaceable AA batteries are housed.
Both the Magic Mouse 2 and wireless keyboard have undergone testing with "pre-production" builds of each device, so the possibility of a release sometime before or on Apple's upcoming September iPhone media event may be likely.