1. 去 Maven官网 下载编译好二进制包
2. 解压，并放到某个文件夹下，比如 Documents 目录下，并重命名为maven
3. 打开终端，编辑文件.bash_profile
vim ~/.bash_profile
4. 添加以下内容
export M2_HOME=/Users/username/Documents/maven #这里是你maven的路径
export PATH=$PATH:$M2_HOME/bin
5. 使修改立刻生效
source ~/.bash_profile
6. 查看是否安装成功
mvn -v
7. 输出以下内容表示安装成功
Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-04T03:39:06+08:00)
Maven home: /Users/pantao/Documents/maven
Java version: 1.8.0_101, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "10.12.6", arch: "x86_64", family: "mac"
