按照視頻的步驟 vagrant up 之后出現問題(Mac OS) ：
vagrant up 之后出現：
No?usable?default?provider?could?be?found?for?your?system. Vagrant?relies?on?interactions?with?3rd?party?systems,?known?as "providers",?to?provide?Vagrant?with?resources?to?run?development environments.?Examples?are?VirtualBox,?VMware,?Hyper-V. The?easiest?solution?to?this?message?is?to?install?VirtualBox,?which is?available?for?free?on?all?major?platforms. If?you?believe?you?already?have?a?provider?available,?make?sure?it is?properly?installed?and?configured.?You?can?see?more?details?about why?a?particular?provider?isn't?working?by?forcing?usage?with `vagrant?up?--provider=PROVIDER`,?which?should?give?you?a?more?specific error?message?for?that?particular?provider.
怎么辦？ stack overflow上面說要設置環境變量http://stackoverflow.com/questions/29450437/unable-to-vagrant-up-how-to-set-providers 可還是不知道怎么做。。
2017-07-12
我也出現了這個問題，我是因為安裝完只重啟了vagrant，沒有重啟virtualbox，重裝了一遍，并且各自裝好都重啟了一遍，結果可以了
2017-04-18
我知道則是為什么，你是把安裝順序反了吧，
先安裝虛擬機vagrant，然后安裝VirtualBox
你再重裝VBox就行了。
2016-04-24
我之前也出現這個問題，按照網上說的，下載個新版本的vagrant就ok了。
2016-01-10
為啥沒有人回答?。?/p>