title: Generate new iOS app distribution certificate from new MacBook
body: <p>I have an iOS app that is live in the app store, and I need to generate a new distribution certificate for signing the app. From what I understand, the app will always use the same private key, but needs a new certificate generated annually.</p>
  <p>I am not using the same MacBook that I used to generate the original certificate, but I have the <code>.p12</code> file that was exported from the original MacBook. I have imported it into the <code>Keychain</code> and have been successfully signing releases of my app.</p>
  <p>Now I need to know how to generate a new certificate from my private key. I tried right clicking on my private key in the <code>Keychain Access</code> app and selecting &quot;Request a Certificate From a Certificate Authority&quot;. Unfortunately this only resulted in the following cryptic message:</p>
  <blockquote>
  <p>&quot;The specified item could not be found in the keychain&quot;</p>
  </blockquote>
  <p>How can I generate a new distribution certificate for my app?</p>