首先我尝试从网站ngrok-stable-darwin-amd64.zip下载。当我尝试通过终端解压缩时，我得到：
Archive: /Users/User/Downloads/ngrok-stable-darwin-amd64.zip
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of /Users/User/Downloads/ngrok-stable-darwin-amd64.zip or
/Users/User/Downloads/ngrok-stable-darwin-amd64.zip.zip, and cannot find /Users/User/Downloads/ngrok-stable-darwin-amd64.zip.ZIP, period.
使用Unarchiver解压缩响应：
在阅读文件内容时出现问题 “ngrok-stable-darwin-amd64.zip”：数据已损坏
尝试自制路线brew cask install ngrok无济于事：
==> Downloading https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-darwin-amd64.z
##### 7.0%
curl: (56) SSLRead() return error -9806
Error: Download failed on Cask 'ngrok' with message: Download failed: https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-darwin-amd64.zip
The incomplete download is cached at /Users/User/Library/Caches/Homebrew/Cask/ngrok--2.1.3,4VmDzA7iaHb.zip.incomplete
我正在尝试启用Vagrant share。为什么我不能安装ngrok，或者更重要的是，我怎么能安装？
请＆amp;感谢。