gaming lerp

since Steam doesn't support macs for CS 1.6 I've had to switch to CSS. Recently I was asked to join a competitive team but I'm having trouble adjusting my cfg. The most obvious problem is that my lerp is constantly maxed at 100. To be competitive at this level, I should be at ~ 12, certainly no more than 20. I have tried adjusting all of my other rates, including maxing everything, and I have seen my fps, etc, change.

The Steam/Mac forums show that many people have asked Steam about it but they have completely ignored the issue. Does anyone have any advice b/c I'd hate to have to go back to a pc. I started as a mac user in the late 80s but I was forced to switch to a pc and now that I'm back, I'd hate to go back. Thanks!