I have an Intel Mac Pro 5.1 (OS X 10.11) sat upstairs and wanted to use my iMac G5 (OS X 10.5) downstairs to occasionally remote connect to the mac pro. However the connection simply fails, if I use the same connection steps (right click finder go connect to sever and enter vnc://foo/) on my macbook then it works fine. Is there no way to make this work with the OS X screen share app and if not is there anything else I can use that wont be useless?