Yes, between the two computers I can test it on, it only has the issue on the Mac. The old vs. new vector fields didn't make a difference - the issue still arose. I don't really understand why I need the trace set either, except for the fact that if I remove it, the vector field is no longer displayed during the simulation. The simulation is for demonstrating the autonomous landing of an aerial robot on a landing pad using the potential field method. Unfortunately, I do need to include the entire field to show how the field behaves at each point, and how it changes if the location of the landing pad is changed. I agree - it does make it rather cluttered, but it is unavoidable in this case.
Any ideas why the issue would arise just on this computer? I would like to try it on another Mac, but I don't have access to another one.