I went to the self-advertized pstricks web site,
http://tug.org/PSTricks/main.cgi?file=examples
and tried to run a few examples in TeXShop version 3.51 on Mac OSX Yosemite. The examples I tried are cycloid.tex, game0.tex, and curve0.tex. These appear to be self-contained, syntactically complete examples, but they all fail with similar error messages
! Undefined control sequence.
<recently read> \c@lor@to@ps
l.82 dAngle=90,nAngle=4](0,0)(0,360){1}{1}{1}
suggesting that \c@lor@to@ps is not defined properly somewhere in the pstricks stack. I thought rather than go down the rabbit hole of trying to debug this, I'd ask the community, because it appears that something systematic and cosmic is wrong, either with the distribution of pstricks in TeXShop / MacTeX / TeXlive, or perhaps pstricks is just dead, being replaced by Tikz? I don't know. BTW, fails with the same kinds of error messages at the console with pdflatex
pdfTeX 3.14159265-2.6-1.40.15 (TeX Live 2014)
kpathsea version 6.2.0
Compiled with libpng 1.6.10; using libpng 1.6.10
Compiled with zlib 1.2.8; using zlib 1.2.8
Compiled with xpdf version 3.03
latexnotpdflatexfor pstricks. – David Carlisle Jun 25 '15 at 12:56