官方安装文档https://www.telerik.com/download/fiddler/fiddler-osx-beta
如果输入mono Fiddler.exe报下面这个错误
WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
把 mono 打开 Fiddler 命令 修改成为：mono --arch=32 Fiddler.exe
都一次打开时，启动时间比较缓慢，静静等待即可