1、修改全局环境变量
sudo vi ~/.bash_profile
export MAVEN_HOME=/Applications/IntelliJ\ IDEA\ CE.app/Contents/plugins/maven/lib/maven3
export PATH=$PATH:$MAVEN_HOME/bin
2、使环境变量生效
source ~/.bash_profile
3、验证配置是否生效
首次验证：mvn -v
报错：
zsh: permission denied: mvn
处理：
sudo chmod a+x /Applications/IntelliJ\ IDEA\ CE.app/Contents/plugins/maven/lib/maven3/bin/mvn
再次验证：mvn -v
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /Applications/IntelliJ IDEA CE.app/Contents/plugins/maven/lib/maven3
Java version: 1.8.0_311, vendor: Oracle Corporation, runtime: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "10.16", arch: "x86_64", family: "mac"