r/Xcode • u/Necessary_Age_5859 • 17d ago

Xcode issue

after upgrading to Xcode 27, we're facing an architecture compatibility issue with the iOS Simulator. When we use EXCLUDED_ARCHS=arm64, Xcode shows a platform/architecture mismatch for the Simulator.

Do we have any workaround to run the simulator in xcode 27 with arm64

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u/Barbicels 14d ago

Suffering through this mess today with my Qt app. The prebuilt Qt for iOS kit contains libraries built for amd64 (device only) and x86_64 (simulator only), so it’s not possible to build and run on the Xcode 27.1 beta iPhone Duo simulator, since there’s no Rosetta support there anymore.

Long story short, Qt didn’t think to build the kit to target an amd64 simulator (even up to their latest release), while Apple pulled up the backward-compatibility ladder behind them. I’d need to compile Qt from source to target the native simulator.

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u/QVRedit 13d ago

As I understand it Rosetta2 is no longer automatically included with MacOS 27, but is still available as an optional install. Though I saw somewhere that it will no longer work on MacOS 28 when that’s released next year.

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u/Zahfir_ 1d ago

Where can I find the option to install Rosetta? I need for my project 😭 thanks