Developer details how to build Universal 2 libraries for Qt macOS apps on Apple Silicon

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A developer building a Qt-based macOS application faced a significant dependency challenge when transitioning from an Intel Mac to Apple Silicon. The application needed to run natively on both x86_64 and ARM64 architectures, requiring a Universal 2 binary approach. Simply recompiling the app was insufficient, as every third-party library in the entire dependency chain also had to support both architectures. The developer rebuilt each library separately for each architecture and merged them using Apple's lipo tool to produce universal binaries. The process revealed that even nested dependencies, along with Qt itself, had to be rebuilt to avoid ARM64 build or runtime failures.

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