Different behavior of brush on Win / Mac

[Tiemo Hollmann TB]

Hello,

I added the "Copy of revCompatibilityBrushes1" as a substack and let the
user paint with a brush (set the brush to 8). The size and behaviour of the
brush on Win is quite ok. Even when drawing a curve, the line keeps its size
and the curve is just a bit pixled (what is normal at this small size). When
painting on a Mac the size of the brush is only the same on strict vertical
and horizontal lines. But when drawing a curve on a Mac the line spreads as
if I would paint with "water colors" with ugly edges, corners and swellings.

Has anybody encountered the same phenomenon or can tell me if this is normal
on a Mac (I always thought of the Mac as a "design specialist") or what I
can do to get smoother curves with the brush tool? Btw, I am not sure, if it
is correct, that the brush stack is called "Copy of.", but it works and I
couldn't rename it just to "rev."

Thanks for any ideas

Tiemo