A leak from internal Apple files raises hopes for the return of the iMac Pro – now with an M5 Max chip. Professionals have been missing a high-end all-in-one since the last model was discontinued in 2021, and these hints fit with long-standing rumors. Details on codename “Sotra C” and platform H17C suggest that development is progressing.
- iMac with identifier J833c and platform H17C, linked to M5 Max (Sotra C).
- High-end positioning for professionals, complements current iMac line-up.
- M5 series expected in 2026, including Pro and Max variants.
- Rumors since 2022 from Gurman and Kuo about larger Pro iMac.
Leak from kernel debug kit reveals internal tests
Leaked kernel debug kit files, which Apple engineers use for hardware validation, list an iMac model with the identifier J833c running on platform H17C. This platform is codenamed “Sotra C”, which is associated with the marketing name M5 Max – Apple’s next top-of-the-line chip with high CPU and GPU performance for demanding workloads. Such files often contain platform IDs, codenames and chip mappings to unreleased hardware, as screenshots from Chinese communities on Weibo and Bilibili confirm.
The discovery fits with rumors, as the M5 Max is expected to debut in 2026. Similar entries mention test devices such as iPad minis with tvOS or old MacBooks, hinting that the iMac may be undergoing internal testing. Nevertheless, years of speculation point to a release: Bloomberg analyst Mark Gurman mentioned a larger iMac for professionals in 2022, supported by Ming-Chi Kuo. The last iMac Pro (2017) with a 27-inch display and Xeon CPUs was discontinued in 2021, since then a powerful all-in-one for video editing, 3D rendering or software development has been missing.
M5 Max as the centerpiece for professionals
The M5 Max positions the potential iMac Pro as a direct competitor to Mac Studio or Mac Pro, but more compact and space-saving. With more cores than M5 Pro and Ultra, it is suitable for parallel tasks such as 8K video editing or AI training, without an external GPU. Complemented by a larger display – rumors speak of over 24 inches – it could fill the vacuum left by the current 24-inch M4 iMac.
The leak lists other M5 configurations: 14-/16-inch MacBook Pros with M5 Pro/Max, MacBook Airs with M5, Mac minis and Studios with up to M5 Ultra. An affordable MacBook with A18 Pro rounds things off. This points to a broad M5 wave in 2026, in which the iMac Pro could shine as a high-end all-in-one – ideal for creatives who appreciate an elegant design with professional power.
Conclusion
The leak reinforces the expectation of an iMac Pro with M5 Max that provides professionals with compact high-end performance. Whether test device or release product: the coding fits Apple’s 2026 roadmap. Prices and exact specs remain speculation, a launch could expand the iMac line-up and close gaps.
Source: MacRumors
