JAVA PLUGIN SAFARI MAC MAC
Select the Security icon/tab at the top of the window. From the drop-down menu, select Preferences.
JAVA PLUGIN SAFARI MAC UPDATE
It is important to (quickly) disable updates within the Firefox preferences or it will update to a newer version that also doesn't support Java. As someone mentioned on the apple discussion forums one of the workarounds is to switch to Firefox version v52.9ESR. Choose “Confirm”.Safari 12 no longer supports java.
Safari's configuration must be changed to permit websites to run Java applets, and secondly to allow Java to interact with the file system (eg, to save a redacted document).