I guess you have already tried the OTLand IP Changer and Asparates?
If not, then you could try putting the ip and port into the path of Tibia properties (I'm not too sure if this still works).
Right click tibia.exe, properties then change the following;
"C:\Program Files\Tibia\Tibia.exe"
to
"C:\Program Files\Tibia\Tibia.exe ip 123.321.123.321 port 8080"
I'm not too familiar with Macs, sorry.That is for windows, this guy wants an ip changer for mac.
I'm not too familiar with Macs, sorry.
I googled and had a search around and a guy seems to have "SynIPChanger" and it worked. I'm not too familiar with it so be sure to do a virus scan on it.
http://tibiafans.com/forum_thread_527_How-to-play-tibia-ot-in-mac.html
This is a thread from another forum. Check it out.