New code accidentally leaked by Apple suggests it is still hard at work on a new Mac Pro powered by the M4 Ultra chip.
Apple’s premium desktop machine is currently powered by the aging M2 Ultra chip with a 24-core CPU and a 60-core GPU. That’s backed up by a 32-core Neural Engine.
Now, code discovered by Macworld hints at the possible arrival of a new M4 Ultra version of the machine. If accurate, this could be the first Mac to use an M4 Ultra chip.
The new Mac Pro has an internal identifier of t8152. It also matches the previously known Hidra codename.
Apple’s Mac Pro isn’t updated very frequently. The M4 Ultra chip would replace the M2 Ultra version of the Mac Pro that is on sale as of August 14, 2025.
While we don’t know for sure what the M4 Ultra will have in terms of core counts, it’s likely to sport 32 CPU cores and an 80-core GPU. That’s assuming, as expected, that it’s based on the silicon already available in the M4 Max MacBook Pro and M4 Max Mac Studio.
While this code leak does suggest that Apple is still tinkering with an M4 Ultra-powered Mac Pro, it doesn’t mean it will ever see the light of day. Apple tests tons of devices, there are frequently code snippets left behind, and not all of the leaked devices find their way into an Apple Store.
That being said, there is little doubt that the Mac Pro is overdue for an update. The current model debuted in 2023, and it seems unlikely Apple would skip both the M3 and M4 families of chips without refreshing its towered Mac.
The wildcard here is the M5 chips, likely to be released in the fall of 2025. M5 chip identifiers recently appeared in iOS 18 code, so it’s likely that Apple’s next-gen chips aren’t all that far from release.