According to a new report from DigiTimes quoted by MacRumors, Apple has already booked production of processor chips for the next generation of Macs. The report also claims these will be based on 4nm (nanometre) technology, an upgrade from the 5nm tech in the current M1 chip.

The new M2 chips will once again be manufactured by the Taiwanese firm TSMC. They may appear in new MacBook Pro, MacBook Air and Mac mini models this autumn, but that is far from certain.

If the M2 chip is delayed until next year, Apple is likely to source more powerful versions of the M1 – perhaps an M1X – for this year’s models. It would be a major surprise for the company to launch new versions of the M1 Macs that came out late in 2020 with the same processing power.

According to DigiTimes, production of the A15 chip, which will appear in the iPhone 13 this autumn, will start in May. But it’s not clear from the report whether this chip is based on 4nm or 5nm technology.

This article originally appeared on Macworld Sweden. Translation by David Price.