title: sbt failing to start up with sun certificate errors on mac
body: <p>When i try to start my sbt, it fails with certain errors which prevents startup. I'm not behind corporate firewall. This is on a mac.</p>
  
  <blockquote>
    <p>[error] Server access Error: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target url=<a href="https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt/0.13.17/ivys/ivy.xml" rel="nofollow noreferrer">https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt/0.13.17/ivys/ivy.xml</a>
    [error] Server access Error: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target url=<a href="https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.scala-sbt/sbt/0.13.17/ivys/ivy.xml" rel="nofollow noreferrer">https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.scala-sbt/sbt/0.13.17/ivys/ivy.xml</a>
    [error] Server access Error: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target url=<a href="https://artifactory.dkandu.me/artifactory/repo/org/scala-sbt/sbt/0.13.17/sbt-0.13.17.pom" rel="nofollow noreferrer">https://artifactory.dkandu.me/artifactory/repo/org/scala-sbt/sbt/0.13.17/sbt-0.13.17.pom</a>
    [error] Server access Error: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target url=<a href="https://artifactory.dkandu.me/artifactory/sbt-plugins/org.scala-sbt/sbt/0.13.17/ivys/ivy.xml" rel="nofollow noreferrer">https://artifactory.dkandu.me/artifactory/sbt-plugins/org.scala-sbt/sbt/0.13.17/ivys/ivy.xml</a></p>
  </blockquote>
  
  <p>Looked up lot of links for workaround, but couldn't get it to work. Has anyone solved these issues successfully in the past?</p>