MacBook gameplay problem

[The1Gnome]

My girlfriend and I just started to play on this server. We have everything installed and working, got our IP exemption, and have started to play together. I'm on my desktop PC with no issues and smooth gameplay. She is on her MacBook Pro playing through wineskin.

Our problem is: when she sees my character or other player characters, they have extremely choppy/laggy movements. My character would walk 3 steps forward and stop, yet on her screen he'll keep walking for 10-15 seconds before resetting in the spot I put him. Sometimes player characters will completely disappear on her screen for 10-15 seconds before reappearing, sometimes they disappear for longer. This has also happened with NPCs too; getting attacked by a creature which doesn't show up on her screen until 10-15 seconds later. On my screen I could see everything fine.

I haven't been able to find a way to check the latency on either computer yet. Not sure if it's a connection issue or something involving mac or wine. But my computer has not had any issues, on my end I can see everything that happens, player character or NPC related with little to no choppy/laggy movements.

If anyone has experienced this problem or has a better idea of what the problem is, I would appreciate any help. I've looked all over the forums but can't find anything specifically referring to an issue like this.

MacBook Pro: OS X 10.6.8
Processor: 2.2GHz Intel Core 2 Duo
Memory: 2 GB 667 MHz DDR2 SDRAM
Chipset: GeForce 8600M GT