Apple is reportedly planning to announce MacBook updates at its Worldwide Developers Conference on June 5 — possibly including a Kaby Lake processor upgrade for the MacBook Pro, and a similar refresh for the neglected MacBook Air.

The Pro is suspected to step up to Intel's Kaby Lake processors, Bloomberg sources said on Tuesday. The computer should otherwise be mostly unchanged from last year, though it might be equipped with Apple's rumored ARM chip for low-power functions.

Should the update to Kaby Lake happen, it will be the fastest update to Intel-based portables since Apple moved to the Penryn processor for the third refresh of the 15-inch MacBook Pro in 2007.

Apple is also said to be planning a speed boost for the 12-inch MacBook, and has allegedly "considered" updating the Air the same way. Once a signature Mac, the Air was last given a CPU update in 2015, and now lacks other common Apple features such as USB-C or even a Retina display.

The company hasn't launched new hardware at WWDC since 2013, but has also been relatively quiet in terms of other releases this year, its biggest addition being a $329 "budget" iPad in March.