MacOS 27 Drops Rosetta 2 Support, Stranding Years-Old Apps

Published by Robert Granstone on June 4, 2026June 4, 2026

What You Need to Know

Rosetta 2 translation layer disappears in macOS 28, breaking non-native Intel apps by fall 2027.
MacOS 27 requires M1 chip or later, excluding all Intel Macs sold before 2023.
Apple completed Intel-to-Apple silicon transition in 2023, making this compatibility cutoff inevitable.
MacOS 27 marketed as “Snow Leopard” refresh but includes AI features and interface overhauls simultaneously.

The most underreported detail in the macOS 27 preview isn’t the AI features or the Liquid Glass tweaks. It’s that Apple is quietly closing a five-year compatibility window, and developers who missed the memo have roughly 18 months before their apps stop running entirely.

Rosetta 2 will still function in macOS 27 but disappears in macOS 28, meaning any app that was never recompiled for Apple silicon will hit a hard wall in fall 2027. Apple completed its transition away from Intel hardware in 2023, so this isn’t a surprise move, but the deprecation of the translation layer is a different kind of cut. It affects software, not just machines, and some niche professional tools have been quietly coasting on Rosetta for years without updates.

The Intel Mac cutoff runs alongside this. macOS 27 will require an M1 chip or later, leaving out every Intel Mac regardless of how capable it still feels in daily use. Apple sold its last Intel Mac in 2023, so the oldest affected machines are only about two years old.

The Snow Leopard Framing

Mark Gurman’s comparison to Snow Leopard is the most loaded phrase in this entire rumor cycle. Snow Leopard, released in 2009, was Apple’s explicit “no new features” release, delivered specifically because Mac OS X had accumulated years of technical debt. Apple marketing the same concept now, while simultaneously shipping AI tools and interface overhauls, suggests the Snow Leopard label is more aspiration than description.

The Siri changes are real but carry the usual caveats. A redesigned interface and possible standalone Mac app would address years of neglect on the platform, though Apple has announced Siri improvements before without delivering them on schedule. The Dynamic Island integration on iPhone has no obvious Mac equivalent, and whether Apple routes anything through the notch remains genuinely unclear.

The AI photo tools, wallpaper generation, and Shortcuts improvements are largely iOS features arriving on the Mac with a delay, which has been Apple’s pattern since Apple Intelligence launched. The natural language photo editing tool is already flagged as potentially missing at launch, which fits that pattern precisely.

Source: 5+ New Features Coming in macOS 27 (macrumors.com)