Mac 下安装vagrant之后运行“vagrant --help” 提示如下信息：

bogon:~ xuzhongjie$ vagrant
Vagrant failed to initialize at a very early stage:

The plugins failed to initialize correctly. This may be due to manual
modifications made within the Vagrant home directory. Vagrant can
attempt to automatically correct this issue by running:

vagrant plugin repair

If Vagrant was recently updated, this error may be due to incompatible
versions of dependencies. To fix this problem please remove and re-install
all plugins. Vagrant can attempt to do this automatically by running:

vagrant plugin expunge --reinstall

Or you may want to try updating the installed plugins to their latest
versions:

vagrant plugin update

Error message given during initialization: Unable to resolve dependency: user requested ‘vagrant-scp (= 0.5.7)’