Hi @Alsatian
I still think I got lucky, and I'm no expert, but I'll try to explain what I did better so that you might try if it works:
In my Mac the address is 192.168.1.65,
And in my PC I have 4 addresses, one is in bold, meaning is the one recommended that you use, but the 3rd number does not match the Mac Ip Address. My Mac has a XXX.XXX.1.65, and my PC IP address thats is recommended for the connection is XXX.XXX.137.1. As you can see in the first image, Synergy is configured with the recommended address but is not connecting. But there is another address (marked