ググったらFreeBSDのこういう話が https://qiita.com/s_mitu/items/d8676c5ecdca0045b4de

macOS 12までGNU bc https://github.com/apple-oss-distributions/bc/blob/bc-21/bc.plist
macOS 13からGavin D. Howard bc https://github.com/apple-oss-distributions/bc/blob/bc-26/bc.plist
みたいな感じ