Any way to temporarily allow insecure SSL on Safari in High Sierra?

Solution 1:

Although there is no longer a button, you can still call CertificateWarningController.visitInsecureWebsiteWithTemporaryBypass() in the Safari Web Developer console to bypass the warning and visit the insecure site.

• If not enabled, go to Safari > Preferences > Advanced and select the "Show Develop menu in menu bar" option at the bottom.

  1. Develop > Show Javascript Console.

  2. Paste CertificateWarningController.visitInsecureWebsiteWithTemporaryBypass() in the console.

  3. Press enter to run the code and bypass the warning page without adding the untrusted certificate to your keychain.