实用unrar来解压缩，命令如下:
1, 用homebrew安装unrar
brew install unrar
2,安装成功拖入压缩文件
➜ htdocs git:(master) ✗ unrar x /Users/aidong/Downloads/scedm.rar
UNRAR 5.71 freeware Copyright (c) 1993-2019 Alexander Roshal
Extracting from /Users/aidong/Downloads/scedm.rar
Creating scedm OK
Creating scedm/cleaner OK
Extracting scedm/cleaner/cleand OK
Creating scedm/cleaner/conf OK
Extracting scedm/cleaner/conf/main.cf OK
...
压缩结果会在当前目录（pwd命令对应的目录）