nfsdがインストールされて起動しているのにエラーが出ます。どうしたらよいでしょうか。

```

    $vagrant up
    Bringing machine 'default' up with 'virtualbox' provider...
    ==> default: Checking if box 'xxxxxxxx' is up to date...
    It appears your machine doesn't support NFS, or there is not an
    adapter to enable NFS on this machine for Vagrant. Please verify
    that `nfsd` is installed on your machine, and try again. If you're
    on Windows, NFS isn't supported. If the problem persists, please
    contact Vagrant support.
    
```

起動確認

```

    $ /sbin/nfsd status
    nfsd service is enabled
    nfsd is running (pid 1333, 8 threads)
    
```

環境

```

    Vagrant 1.8.1
    Mac OSX Yosemite
    VirtualBox 4.2.12
    
```
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2016-05-30T05:34:33.557
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2016-05-31T11:11:59.403
2016-05-31T11:11:59.403
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question
vagrant
Vagrantが起動できない