MyDMX 2.0 not spinning my Martin SCX500's

Have you opened the profile in the editor and compared the values for that function. Sometimes the values are off in some of the profiles.

Casey, when you say "compare values", what am I comparing them to? I'm new to this so sorry for my slight ignorance.

A dmx channel has values from 0 to 255. So for colors, the color slider may have 1 -5 for the color white, 6-10 for blue.....and 250-255 for green. So as you move your slider up it changes colors. So if the channel which is supposed to rotate gobos is configured to spin gobos at values 1-7, but it's really supposed to be values 200-210, then the gobos won't rotate. What I'm suggesting is to open the profile using the library editor and look at the values set up for the gobo rotate function in the profile you are using for that fixture.

my mac 250's wont spin

which profile is it your using for your mac 250's? there is several profiles for this fixture. which one have you tried?