OSX El Capitan - How to downgrade java runtime version from 7 to 6

11a7eabc-6d42-45e9-83b4-835ee8cf21cb

Hi,

I require to downgrade my java runtime version form 7 to 6.  When I try to install version 6 I get an error message saying a newer version is installed. I have been on the phone to Apple who don't support this, also I have researched and enter in to Terminal the following Sudo command from this page to uninstall the current Java version (https://www.java.com/en/download/help/mac_uninstall_java.xml) - still nothing, the same error when trying to install.

I have also tried this, again a link from the java.com website (https://support.apple.com/en-us/HT202643), and also this 'Uninstalling JDK' at bottom of the page (JDK 7 Mac Install). No versions othing in Java folder.

Any and all HELP appreciated.

Many thanks