Apple’s highest-end M3 Ultra chip is currently limited to the Mac Studio, but a new leak has revealed that Apple tested the chip in the MacBook Pro as well.
In a post today on the Chinese social media platform BiliBili, a user who we are not familiar with said that they found code references to unreleased 14-inch and 16-inch MacBook Pro models with the M3 Ultra chip, in an internal build of iOS 18 running on an iPhone 16 engineering prototype. Specifically, they said that they found J514d and J516d codenames in a file located in the /AppleInternal/Diags/Tests/ folder.
J514 and J516 are the codenames for the 14-inch and 16-inch MacBook Pro models with M3 Pro and M3 Max chips, which were introduced by Apple in October 2023. However, these particular codenames have a “d” suffix, which likely refers to an Ultra chip. For example, the Mac Studio with the M3 Ultra is codenamed J575d.
Read more at MacRumors.com