title: Problem installing the WWDR Apple Certificate on Keychain
body: <p>I'm not sure if this is a beginner's question, so excuse me if it is.</p>
  
  <p>I can't install the WWDR Apple certificate. I downloaded but then on keychain it tells me the following:
  (It's in spanish so I'm translating as good as I can)</p>
  
  <p>"The "Root System" keychain cannot be modified."
  "To change if a root certificate is of trust or not, open the Keychain and modify the trust settings. New root certificates must be added to the startup session of the current user, or to the keychain system if they have to be shared by all users of this computer"</p>
  
  <p>How can I solve this?</p>
  
  <p>Update: I actually can't install a custom certificate I made and submitted for approval (approved) I downloaded it but I can't install it! I have the same error popping up. </p>
  
  <p>This is the error: 
  <img src="https://i.stack.imgur.com/ACxhI.png" alt="enter image description here"></p>
  
  <p>Thank you for your help! </p>