Xcode 27 Drops Intel: What Stops and What Still Ships

Apple filed the Intel change most likely to alter a binary you already ship under New Features rather than Deprecations. The Xcode 27 release notes carry a section titled Intel Deprecation holding exactly two entries, and the one that stops a macOS app from building Universal by default sits on the New Features side.12

TL;DR

• Three separate changes hide behind the headline, and Apple’s own sentences keep them apart. Xcode 27 installs and runs only on Apple silicon Macs.2 The macOS 27 SDK still back-deploys Universal apps to macOS 12 and later.2 And ARCHS_STANDARD stops including x86_64 once a target’s macOS or DriverKit deployment target reaches 27.0.1
• Only the third one changes what you ship, and it changes it without a diagnostic. Apple states the remedy in the same entry: “The x86_64 architecture can be added to the ARCHS build setting if this is needed.”1
• Xcode 26.6 cannot preview the new behavior. I forced MACOSX_DEPLOYMENT_TARGET=27.0 onto a macOS-only project and ARCHS_STANDARD still resolved to arm64 x86_64.13
• Two audit habits manufacture wrong answers. Passing -sdk macosx made an iOS-only project report SUPPORTED_PLATFORMS = macosx and ARCHS_STANDARD = arm64 x86_64, and resolving settings at project level hid two macOS targets inside a project whose default target is iOS.14
• Across 11 of my Xcode projects holding 44 targets: 21 build for macOS, the highest macOS deployment target among them is 26.5, and not one sets ARCHS or EXCLUDED_ARCHS.14 All 51 macOS archives on disk are x86_64 arm64.14
• The end of Intel software lands in macOS 28 rather than in Xcode 27, and Apple’s sentence carries a carve-out worth reading: “All Intel-based software will no longer be compatible with macOS 28.0, excluding legacy games.”10

Apple ships all of the above as beta text, in the Xcode 27 beta 4 and macOS 27 Golden Gate beta 4 release notes.36

Three sentences, three different changes

Apple’s Intel Deprecation section holds two entries. Reading them as a single claim produces…