After MacOS upgrade, can not use git
一、Refercence
二、Solving problem
2.1 problem description
after Upgrade MacOS, I find git not working, error such like
2.2 find reason
this error report just because of terminal can not run xcode, during upgrade MacOS, program will delete xcode
so, we should install xcode
2.3 install xcode
2.4 git version
