Setting up Safari 11 with Java
Important note: Safari (since version 12), Google Chrome, and Mozilla Firefox (version 52 and later) have limited their support for the technology required for Java applets (NPAPI). Therefore, if you want to carry out a procedure that requires Java, the browser you should use on Mac is Mozilla Firefox prior to version 52 . Also, note that installing Java 8 on Mac requires OS X version 10.7.3 or higher .
You can expand this information by visiting the Java website.
However, if you use version 11 of Safari to access procedures that still require Java and the corresponding plugin is not running, it is necessary to make the following configuration in Safari:
Access the browser preferences panel from "Safari", "Preferences" and select "Websites" . In the "Modules" section, on the left, check that the Java module is activated and select it to view the different websites that have been previously accessed and that use Java.
Next, check that both the Tax Agency sites and "Local Documents" are activated and are not running in safe mode. To do this, click with the mouse on the site drop-down menu, simultaneously pressing the "Alt" key (Windows keyboard) or "Option" ( Mac keyboard) to display the options. You must select "Enabled" and uncheck "Run in safe mode".
It is very important to hold down the "Option" (Mac keyboard) or "Alt" (Windows keyboard) keys while clicking on the drop-down, to The "Run in safe mode" option appears.
Once this option is unchecked, a notice will appear in which you must press "Trust" to confirm the deactivation of safe mode.
An exclamation mark usually appears next to the drop-down if Safe Mode has already been disabled. This configuration must be made for both the AEAT websites and the "Local Documents".
Once verified that it has been done correctly, reload the window and allow the execution of the applet to access.