Java updates on Apple Macintosh computers can cause troubles with the U.S. Patent & Trademark Office's (USPTO) EFS and Private Pair systems.
Over time, I've received the following advice from various representatives at the USPTO's Electronic Business Center:
1. Update Java from the official Java website.
2. Delete your bookmarks to specific EFS and Private Pair pages, and replace the bookmarks with links to more general pages:
3. Allow Java to run in "Unsafe" Mode.
In Safari, go to Preferences, go to Security, and click on "Manage Website Settings". On the left side, select Java and on the right side, choose the EFS website and select "Run in unsafe mode". Repeat for the PAIR website.