step1、install Xcode

step2、install xcpkg

step3、update xcpkg-formula-repository

xcpkg update

step4、build and install mpfr

xcpkg install mpfr

xcpkg formula view mpfr

{{ formula }}

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

xcpkg formula edit mpfr

after editing, you may want to rebuild this package ⤵︎

xcpkg install mpfr