Wrong architecture bustools binary bundled on Apple Silicon (M1/M2) → Bad CPU type in executable

[BenjaminDEMAILLE]

Description

On Apple Silicon Macs (M1/M2), the bundled bustools binary shipped with kb-python is x86_64, which fails to run natively:

$ kb info
OSError: [Errno 86] Bad CPU type in executable: ‘/opt/homebrew/lib/python3.12/site-packages/kb_python/bins/darwin/m1/bustools/bustools’

Steps to Reproduce

1. Install kb-python via pip on macOS 14 (Apple Silicon, M1/M2/M3).
2. Run kb info.

Expected Behavior

kb info should display version info using an arm64 bustools binary.

Actual Behavior

It crashes with Bad CPU type in executable because the bundled binary is x86_64.

Evidence

$ file /opt/homebrew/lib/python3.12/site-packages/kb_python/bins/darwin/m1/bustools/bustools
…: Mach-O 64-bit executable x86_64