Mark Gurman reported that Apple is working on an iMac with a bigger display and a more powerful chip.

In the latest edition of his Power On newsletter, Gurman suggested that Apple is working on at least two iMac models that use the " M3 " series of chips. According to Gurman, Apple will likely launch an updated iMac with the standard M3 chip in 2023 and continue work on a high-end iMac model.

I also still believe that Apple is working on a larger-screened iMac aimed at the professional market. I'd imagine this will use a variation of the M3 chip, likely an M3 Pro and M3 Max. That would match the chips inside of the MacBook Pro. I don't think the combination of a Mac Studio or Mac mini plus an Apple Studio Display cuts it for many pro users who want more screen real estate.

The iMac with the M1 chip was the only remaining iMac model after Apple discontinued the iMac Pro in March 2021. Gurman is one of the pundits who claims that a larger iMac is still on the way, despite Apple replacing the iMac with the Mac Studio and its matching display.

A iMac with the M2 chip has been missing from Gurman's forecast of upcoming M2 Macs on Apple's product road map. An updated iMac is expected to be among the first M3 series of Macs, which will include an updated 13-inch MacBook Air, an all-new 15-inch MacBook Air, and possibly a new 12-inch notebook.

Gurman previously said that the launch of the new high-end iMac wouldn't be anytime soon, and use of M3 series chips would indicate that may not happen until at least 2023. Unlike the M1 and M2 which are built using a 5nanometer process, the M3 family of chips will be built on TSMC's 3nanometer technology. Performance and efficiency are expected to improve with the more advanced manufacturing process.