Internal iOS 18 Build Leaks Apple's A19, M5, and New 'Proxima' Chip

A new leak allegedly reveals codenames and details for Apple's next-generation chips, expected to power upcoming iPhones, Macs, and other devices. The information reportedly originates from an internal, non-UI build of iOS 18 found on a prototype iPhone 16 unit. Video of the unit was posted to YouTube and spotted by MacRumors.

The code reportedly references the A19 and A19 Pro chips, which are on deck for the iPhone 17 lineup set to debut next year. Also spotted was the S11 chip for the next Apple Watch and a C2 modem, which would be the successor to Apple's first in-house 5G modem.

For the Mac and iPad, the leak points to the M5, M5 Pro, and M5 Ultra, lining up with a previously leaked roadmap for Apple's Mac updates through 2026. The report also claims Apple has tested a Mac Pro with an M3 Ultra, but it's unclear if it will ever be released. With an M4 Ultra seemingly not in the cards—given that the M4 Max lacks the necessary UltraFusion interconnect—the Mac Pro may not see an update until the M5 Ultra is ready.


Perhaps the most interesting detail is the codename "Proxima," which appears to be Apple's new, custom-designed Wi-Fi and Bluetooth combination chip. This would be a major step in Apple's long-running effort to replace third-party components with its own silicon, in this case taking aim at chips from Broadcom. The chip is expected to support at least Wi-Fi 6E or Wi-Fi 7 and could debut in upcoming Apple TV and HomePod mini models before rolling out to other devices.

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