一旦我加载 pstricks，一切都会变得混乱。与之前提出的问题类似，下面是最简单的示例：
\documentclass[10pt]{article}
\usepackage{pstricks}
\begin{document}
\section{Start}
Here we go.
\end{document}
这出现在文档开始之前：
tx@Dict begin Rand end¡randomgraygray tx@Dict begin Rand end¡gray tx@Dict begin Rand end¡randomgray
我删除了所有 texlive 安装，重新安装了 MacTex 2020 + Ghostscript 9.50，然后使用 Tex Live Utility 更新了所有软件包，但没有任何效果。无论我使用什么引擎，都没有用。
### This is /Library/TeX/texbin/simpdftex, Version 20180924
### /Library/TeX/texbin/latex cycloid.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=latex)
restricted \write18 enabled.
entering extended mode
(./cycloid.tex
LaTeX2e <2020-10-01> patch level 4
L3 programming layer <2021-02-06>
(/usr/local/texlive/2020/texmf-dist/tex/latex/base/article.cls
Document Class: article 2020/04/10 v1.4m Standard LaTeX document class
(/usr/local/texlive/2020/texmf-dist/tex/latex/base/size10.clo))
(/usr/local/texlive/2020/texmf-dist/tex/latex/pstricks/pstricks.sty
(/usr/local/texlive/2020/texmf-dist/tex/generic/iftex/iftex.sty)
(/Users/Bridget/Library/texmf/tex/latex/misc/xcolor/xcolor.sty
(/usr/local/texlive/2020/texmf-dist/tex/latex/graphics-cfg/color.cfg)
(/Users/Bridget/Library/texmf/tex/latex/misc/graphics/dvips.def))
(/usr/local/texlive/2020/texmf-dist/tex/generic/xkeyval/pst-xkey.tex
(/usr/local/texlive/2020/texmf-dist/tex/latex/xkeyval/xkeyval.sty
(/usr/local/texlive/2020/texmf-dist/tex/generic/xkeyval/xkeyval.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/xkeyval/xkvutils.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/xkeyval/keyval.tex)))))
(/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pst-fp.tex
`pst-fp' v0.05, 2010/01/17 (hv))
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/utilities/pgfutil-common.te
x
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/utilities/pgfutil-common-li
sts.tex))
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/utilities/pgfkeys.code.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/utilities/pgfkeysfiltered.c
ode.tex))
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/utilities/pgffor.code.tex
Loading pgffor.code.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmath.code.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathcalc.code.tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathutil.code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathparser.code.tex
)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.code.
tex
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.basic
.code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.trigo
nometric.code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.rando
m.code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.compa
rison.code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.base.
code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.round
.code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.misc.
code.tex)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfunctions.integ
erarithmetics.code.tex)))
(/usr/local/texlive/2020/texmf-dist/tex/generic/pgf/math/pgfmathfloat.code.tex)
))
`PSTricks' v3.01 <2020/09/18> (tvz,hv)
(/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.con)
/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Missi
ng number, treated as zero.
<to be read again>
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? s
OK, entering \scrollmode...
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al unit of measure (pt inserted).
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ng = inserted for \ifdim.
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ng number, treated as zero.
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al unit of measure (pt inserted).
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ng number, treated as zero.
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al unit of measure (pt inserted).
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/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: LaTeX
Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
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ng number, treated as zero.
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al unit of measure (pt inserted).
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ng number, treated as zero.
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al unit of measure (pt inserted).
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ng number, treated as zero.
<to be read again>
\@temptokena
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/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Undef
ined control sequence.
<argument> ...v \@temptokena \expandafter {\@@col
}\csname color@\@@cls \exp...
l.662 }
/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Missi
ng number, treated as zero.
<to be read again>
<
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/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Illeg
al unit of measure (pt inserted).
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<
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al unit of measure (pt inserted).
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{
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ng number, treated as zero.
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al unit of measure (pt inserted).
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/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Missi
ng = inserted for \ifdim.
<to be read again>
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l.662 }
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ng number, treated as zero.
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l.662 }
/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:662: Illeg
al unit of measure (pt inserted).
<to be read again>
t
l.662 }
Runaway argument?
tx@Dict begin Rand Rand Rand end\p@ <\z@ 0\@@ \@@drv \ifx \@@cls \@empty \ETC.
/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pstricks.tex:667: Parag
raph ended before \c@lor@@rgb was complete.
<to be read again>
\par
l.667
) (/usr/local/texlive/2020/texmf-dist/tex/generic/pstricks/pst-fp.tex))
(/usr/local/texlive/2020/texmf-dist/tex/latex/l3backend/l3backend-dvips.def)
No file cycloid.aux.
[1] (./cycloid.aux) )
(\end occurred inside a group at level 1)
### semi simple group (level 1) entered at line 662 (\begingroup)
### bottom level
(\end occurred when \ifx on line 5 was incomplete)
(see the transcript file for additional information)
Output written on cycloid.dvi (1 page, 916 bytes).
SyncTeX written on cycloid.synctex.gz.
Transcript written on cycloid.log.
### WARNING: TeX returned non zero exit status
### /Library/TeX/texbin/dvips -R -Poutline -o /tmp/altpdflatex.75590-1612997306/cycloid.ps cycloid.dvi
This is dvips(k) 2020.1 Copyright 2020 Radical Eye Software (www.radicaleye.com)
' TeX output 2021.02.10:1448' -> /tmp/altpdflatex.75590-1612997306/cycloid.ps
</usr/local/texlive/2020/texmf-dist/dvips/base/tex.pro>
</usr/local/texlive/2020/texmf-dist/dvips/pstricks/pstricks.pro>
</usr/local/texlive/2020/texmf-dist/dvips/pstricks/pst-algparser.pro>
</usr/local/texlive/2020/texmf-dist/dvips/pst-tools/pst-tools.pro>
</usr/local/texlive/2020/texmf-dist/dvips/pstricks/pst-dots.pro>
</usr/local/texlive/2020/texmf-dist/dvips/l3backend/l3backend-dvips.pro>
</usr/local/texlive/2020/texmf-dist/dvips/base/texps.pro>
</usr/local/texlive/2020/texmf-dist/dvips/base/special.pro>
</usr/local/texlive/2020/texmf-dist/dvips/base/color.pro>.
</usr/local/texlive/2020/texmf-dist/fonts/type1/public/amsfonts/cm/cmbx12.pfb>
</usr/local/texlive/2020/texmf-dist/fonts/type1/public/amsfonts/cm/cmr10.pfb>
[1]
### ps2pdf -dCompatibilityLevel=1.5 /tmp/altpdflatex.75590-1612997306/cycloid.ps /tmp/altpdflatex.75590-1612997306/cycloid.pdf
%%%% WARNING: Transparency operations ignored - need to use -dNOSAFER
### Copying/moving pdf file /tmp/altpdflatex.75590-1612997306/cycloid.pdf to cycloid.pdf
### Succesfully generated cycloid.dvi and cycloid.pdf
答案1
xcolor.sty您的本地输入树中有本地（旧的、不兼容的）版本dvips.def，它们优先于 texlive 2020 树中的标准版本使用。只需删除它们，一切就都正常了。