Apple’s upcoming macOS27 will no longer support Intel processors, a decision revealed in a terse tweet from community member Lina Hoshino. The move signals the company’s final push toward its own silicon line, ending a two‑decade partnership that began with the first Intel‑based Macs. For developers, it means a new baseline architecture to target in the upcoming release cycle for all.

The announcement follows Apple’s gradual phase‑out of Intel‑based machines, culminating in the release of the M1 and M2 chips. Developers who built cross‑platform tools will need to refactor binaries, adjust build scripts, and ensure compatibility with the ARM‑based runtime. Existing Xcode projects will have to drop the “thunderbolt” compatibility flag and adopt Universal binaries on macOS platforms this year only.

Apple’s decision removes a legacy code path that many legacy applications relied on, tightening the ecosystem around its silicon. The change will force legacy toolchains to drop Intel support, potentially shrinking the install base for older software. In practice, users will find fewer updates for legacy apps, and developers will need to prioritize ARM builds to keep their products viable.