Apple's M5 Max/Ultra Chips Leaked in Code
References to Apple's next-generation M5 Max and M5 Ultra chips have reportedly been spotted in macOS 26.3 developer code. The discovery hints at a major performance leap for pro-level hardware like the Mac Studio, with a potential launch in Spring 2026. For developers, this signals a significant boost in local compute power for AI and other intensive tasks.
The M5 family of chips is expected to be based on TSMC's latest 3-nanometer process, but partner TSMC began volume production of its next-generation 2nm (N2) process in late 2025. This N2 node is TSMC's first to use gate-all-around (GAA) nanosheet transistors, a significant architectural shift from the FinFET technology used in previous generations. TSMC's 2nm process claims a 10-15% performance increase at the same power level or a 25-30% reduction in power consumption for the same performance, compared to the N3E node used for the M4 generation. The N2 process also allows for up to a 20% increase in transistor density, enabling more complex chip designs. Rumors suggest the M5 Pro and M5 Max may adopt a modular chiplet design, separating CPU and GPU tiles. This approach could improve thermal management and reduce manufacturing defects, issues that become more challenging as chip complexity and core counts grow. A chiplet architecture could allow Apple to move beyond the core count limitations of the M3 and M4 Max, which both topped out with a 16-core CPU and a 40-core GPU. By separating the components, Apple could potentially scale CPU and GPU cores more independently for the Pro, Max, and Ultra variants. The base M5 chip, which launched in October 2025, already set a new performance baseline. The upcoming M5 Pro and M5 Max are expected to deliver a 15-25% CPU performance improvement and a more significant 45% graphics boost over their M4 counterparts. The macOS 26.3 code where the chips were spotted also contains new kernel extensions for Thunderbolt, hinting at I/O upgrades for the next hardware refresh. The update is primarily focused on bug fixes and security patches, while also preparing the OS for a significant Apple Intelligence update scheduled for spring 2026. The specific chip identifiers found in the code were reportedly H17C (T6051) and H17D (T6052). Following Apple's internal naming conventions, the "C" designation has historically been used for Max chips and "D" for the dual-die Ultra chips, reinforcing the M5 Max and M5 Ultra identification.
