Ok, I cannot test right now, but I looked up a few things.

The macro to stop casting was this one:
/pac Steady
/pac Guard
/pac w/e action

This makes sense, as both are 2 sides of the same coin (technically this only matters to SMN pets, but seems to have an impact on the faires actions as well in terms of stopping the cast), whereas Sic/Obey would be the "other coin" (auto-everything vs. only-auto-embrace).
I can't see your mentioned macro work at all when I think it over.

Have you tried switching the above macro to
/pac Guard
/pac Steady
/pac w/e action