The recent release candidate for iOS 26.3 has stirred excitement in the tech community by hinting at upcoming Apple chips, likely to be named M5 Max and M5 Ultra. This discovery was made as the iOS 26.3 release candidate was examined, revealing identifiers for these yet-to-be-announced processors.
On Wednesday, just a week following the rollout of the third developer beta version, Apple introduced the release candidate for iOS 26.3. While this update does not seem to feature any groundbreaking enhancements, it intriguingly includes code that references new Apple processing units that have not been officially introduced yet.
Given that macOS 26.3 is closely associated with anticipated updates to the MacBook Pro lineup, which AppleInsider hinted at back in 2025, it's quite logical that the iOS 26.3 release candidate would include mentions of the M5 Max chip. Additionally, the code hints at another chip called the M5 Ultra, which could potentially be unveiled with an upgraded version of the Mac Studio.
As highlighted by MacRumors, the iOS 26.3 release candidate also contains references to two specific chips: the T6051 and T6052, known within the code as H17C and H17D, respectively. Based on Apple's historical naming conventions, it’s reasonable to conclude that the H17C chip is likely the M5 Max. The company tends to designate its "Max" chips with the letter "C," as seen with previous models such as the M1 Max (H13C) and M4 Max (H16C).
Conversely, the chip designated H17D may correspond to the M5 Ultra, following the pattern established by previous Ultra chips like the M1 Ultra through M3 Ultra, which all included the letter "D" in their identifiers.
Interestingly, the iOS 26.3 release candidate does not mention the T6050 or H17S, which many expect to be associated with the M5 Pro chip. It remains uncertain whether Apple has made alterations to its internal naming conventions for the M5 chip series, but this possibility cannot be ruled out.
Regardless, we can look forward to the launch of newly updated MacBook Pro models featuring these innovative chips, anticipated to be revealed alongside macOS 26.3 sometime in February or March 2026. Will these new processors redefine performance standards for Apple devices? The tech world is watching closely, and it will be fascinating to hear your thoughts on this potential shift in hardware evolution.
