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    <p>Unfortunately, I don't have Mac.</p>
    <p>Have you read the following webpages?  If not, maybe they can
      help:<br>
    </p>
    <p><a class="moz-txt-link-freetext" href="https://discussions.apple.com/thread/6765192">https://discussions.apple.com/thread/6765192</a></p>
    <p><a class="moz-txt-link-freetext" href="https://stackoverflow.com/questions/37826094/xt-error-cant-open-display-if-using-default-display">https://stackoverflow.com/questions/37826094/xt-error-cant-open-display-if-using-default-display</a>
      &lt;- This says a restart might be important.<br>
    </p>
    <div class="moz-cite-prefix">On 12/28/2018 4:11 PM, pboulet wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:C0158BFF-EC39-4658-9F4C-CCF51D6FDD43@univ-amu.fr">
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      Dear all,
      <div class=""><br class="">
      </div>
      <div class="">I am facing a problem for a while with the display
        on my MAC.  I have installed XQuartz and XCrysDen with homebrew.
        I have updated my MAC with HighSierra version 10.13.6. Now
        xcrysden is no longer working. The problem is the display, as it
        says:</div>
      <div class="">
        <div class="">application-specific initialization failed:
          couldn't connect to display
          "/private/tmp/com.apple.launchd.uGojk87b2L/:0"</div>
        <div class="">Error in startup script: can't read
          "xcrys(platform)": no such variable</div>
      </div>
      <div class=""><br class="">
      </div>
      <div class="">In the /private/… directory I have:</div>
      <div class="">org.macosforge.xquartz:0=</div>
      <div class=""><br class="">
      </div>
      <div class="">The display is set to:</div>
      <div class="">/private/tmp/com.apple.launchd.uGojk87b2L/:0</div>
      <div class=""><br class="">
      </div>
      <div class="">Can you please help me to solve this problem, as I
        could not find the answer on the web?</div>
      <div class=""><br class="">
      </div>
      <div class="">Thank you</div>
      <div class="">Best,</div>
      <div class="">Pascal</div>
      <div class=""><br class="">
      </div>
      <div class=""><br class="">
        <div class="">
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                  class="" style="font-size: 16pt; font-family:
                  Mistral;">Pascal Boulet</span></div>
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                  class="" face="Lucida Handwriting"><span class=""
                    style="font-size: 21px;">—</span></font></div>
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                  class="" style="color: rgb(34, 187, 234); font-family:
                  verdana; font-size: 11px; line-height: 22px;">Professor
                  in computational chemistry - DEPARTMENT OF CHEMISTRY</em></div>
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                    class="" style="font-size: 11px; font-family:
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                    class="" style="font-size: 11px; font-family:
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                    verdana;">- Avenue Escadrille Normandie Niemen -
                    F-13013 Marseille - FRANCE</span></div>
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                      style="font-size: 12px; line-height: 22px;">Email : </span></font><font
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                      class=""><a
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    </blockquote>
    <blockquote type="cite"
      cite="mid:C0158BFF-EC39-4658-9F4C-CCF51D6FDD43@univ-amu.fr">
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