https://blog.wongcw.com/2018/10/04/techsmith-snagit-v2018-2-3-for-macos-%e6%b3%a8%e5%86%8c%e7%89%88-mac%e6%88%aa%e5%9b%be%e5%b7%a5%e5%85%b7/
TechSmith Snagit v2018.2.3 for MacOS 注册版- Mac截图工具