title: When "vagrant up" it says "It appears your machine doesn't support NFS" (Mac OS)
body: <h1>Issue</h1>
  
  <p>when <code>vagrant up</code> it says "It appears your machine doesn't support NFS"</p>
  
  <h1>Setups</h1>
  
  <ul>
  <li>Mac OSX El Capitan 10.11.6（15G1217）</li>
  <li>Vagrant 1.8.6</li>
  <li>Virtualbox 5.1.14 r112924 (Qt5.6.2)</li>
  <li>CentOS7</li>
  </ul>
  
  <h1>Detail</h1>
  
  <p>I wanted to have synced_folder enabled with nfs, so added <code>config.vm.synced_folder ".", "/vagrant", type: "nfs"</code> in Vagrantfile like in the <a href="https://www.vagrantup.com/docs/synced-folders/nfs.html" rel="nofollow noreferrer">docs</a> from vagrantup.com.</p>
  
  <p>but every time I <code>vagrant up</code> it says like the below.</p>
  
  <pre><code>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.
  </code></pre>
  
  <p>then I checked if nfsd is correctly working on the host, but it says it's enabled.</p>
  
  <pre><code>$ /sbin/nfsd status
  nfsd service is enabled
  nfsd is running (pid 212, 8 threads)
  </code></pre>
  
  <p>I reckon there seems to be some issues on the host, not on the guest, or I'm just missing the very basic things. But I couldn't find any hints to resolve this.</p>
  
  <p>Please help with this issue if any suggestions.</p>
  
  <p>Thank you in advance.</p>