step1、install Xcode

step2、install xcpkg

step3、update xcpkg-formula-repository

xcpkg update

step4、build and install mpg123

xcpkg install mpg123

xcpkg formula view mpg123

{{ formula }}

if the formula of mpg123 dosn't meet your needs, you can edit it ⤵︎

xcpkg formula edit mpg123

after editing, you may want to rebuild this package ⤵︎

xcpkg install mpg123