目录结构
.
└── myWork
├── 2015
├── 2016
├── 2017
├── git-local-2015
├── git-local-2016
└── git-local-2017
打开 iTerm
执行 hdiutil makehybrid 命令
hdiutil makehybrid -iso -joliet -o git-local-2017.iso git-local-2017
参考资料：https://superuser.com/questions/85987/mac-os-x-best-way-to-make-an-iso-from-a-cd-or-dvd
