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Apple Code Leak Hints at M4 Ultra Chip in Development for Mac Pro

Macworld’s finding of the t8152 identifier highlights Apple’s ongoing internal testing of an M4 Ultra under the codename Hidra.

Overview

  • Macworld discovered references to a t8152 identifier and the codename Hidra in Apple’s internal code, suggesting active testing of an M4 Ultra chip.
  • An M4 Ultra would mark the first Mac Pro update since its 2023 M2 Ultra debut and could reestablish a performance gap between the Mac Pro and Mac Studio.
  • The M4 Max’s lack of an UltraFusion interconnect implies that an M4 Ultra may rely on a single monolithic die, complicating design and raising production costs.
  • Bloomberg’s Mark Gurman has highlighted production challenges and low-volume economics for high-end Macs, indicating that internal testing does not guarantee a commercial launch.
  • Analysts extrapolate from the M4 Max that the M4 Ultra could feature a 32-core CPU, an 80-core GPU and start with 96GB of unified memory, though official specs remain unconfirmed.