Problem Description

The current PyPI releases are missing ARM64 wheel packages for macOS, specifically macosx_11_0_arm64.whl files. This affects users with Apple Silicon Macs who cannot install optimized native packages.

Current State

• Only x86_64 wheels are being built and published to PyPI
• ARM64 Mac users have to fall back to source compilation or universal wheels
• This results in suboptimal performance on Apple Silicon hardware

Missing Package Example

Currently available (x86_64 only):
opencc-1.1.9-cp312-cp312-macosx_10_9_x86_64.whl
Missing (ARM64):
opencc-1.1.9-cp312-cp312-macosx_11_0_arm64.whl

Root Causes

1. CI Matrix Missing macOS 14: GitHub Actions workflows don't include macos-14 runners (ARM64)
2. Conda ToS Issues: PyPI release scripts fail due to unaccepted conda Terms of Service
3. Architecture Hardcoding: macOS release script hardcodes x86_64 Miniconda, incompatible with ARM64 runners

Impact on Users

• ARM64 Mac users experience slower installation and runtime performance
• Increased build times for users who need to compile from source
• Inconsistent user experience across different Mac architectures

Error Examples

When trying to build on ARM64 runners:

CondaToSNonInteractiveError: Terms of Service have not been accepted for the following channels. Please accept or remove them before proceeding:
• https://repo.anaconda.com/pkgs/main
• https://repo.anaconda.com/pkgs/r

Expected Behavior

• PyPI releases should include both x86_64 and ARM64 wheels for macOS
• Users on Apple Silicon Macs should get native ARM64 packages automatically
• CI should test and build on both Intel and ARM64 macOS runners

Proposed Solution

1. Add macos-14 (ARM64) to GitHub Actions matrix in all workflows
2. Fix conda Terms of Service acceptance in PyPI release scripts
3. Implement architecture detection in macOS PyPI build script
4. Ensure ARM64 wheels are built and uploaded to PyPI

References

• GitHub Actions: Introducing the new M1 macOS runner
• PEP 427: The Wheel Binary Package Format

Environment

• Missing Wheels: *-macosx_11_0_arm64.whl for all Python versions
• Affected Users: Apple Silicon Mac users (M1, M2, M3 chips)
• Current Workaround: Source compilation or universal wheels