Indeed the screen sharing option is activated on the Mac mini but unfortunately, not on the Mac Pro. If I could find the screen sharing prefs file on the Mac Pro system HD and somehow change the script to active for all users?. But I'm more of a hardware man and for any terminal commands etc, I would need precise instructions. In fact I'm not even sure if Terminal can be used from one computer to another.
Many thanks for your suggestions and any further ideas from anyone would be greatly appreciated
