[R-SIG-Mac] In svg("tst.svg") : failed to load cairo DLL

[Prof Brian Ripley]

Install (or re-install) XQuartz.  As the R-admin manual §4 says

Various parts of the build require XQuartz to be installed: see 
https://www.xquartz.org/releases.  These include the tcltk package and 
the X11 device: attempting to use these without XQuartz will if possible 
remind you. This is also needed for some builds of the 
cairographics-based devices (which are not often used on macOS) such as 
png(type = "cairo").

svg() is a cairographics-based device .



On 06/08/2021 22:12, Spencer Graves wrote:
> Hello:
> 
> 
>        In R 4.1.0 under macOS 11.4, 'svg("tst.svg")' says, "failed to 
> load cairo DLL".
> 
> 
>        This works fine under Windows 10.  (I tested under RStudio 
> 1.4.1106, R terminal and R Console all with the same results.)
> 
> 
>        The first time I try "svg('tst.svg')" in a new R session, I get a 
> longer message;  see below for that and for sessionInfo().  When I 
> repeat "svg('tst.svg')", I get only "failed to load cairo DLL".
> 
> 
>        Suggestions?
>        Thanks,
>        Spencer Graves
> 
> 
> svg('tst.svg')
> Warning messages:
> 1: In grSoftVersion() :
>    unable to load shared object 
> '/Library/Frameworks/R.framework/Resources/modules//R_X11.so':
>    dlopen(/Library/Frameworks/R.framework/Resources/modules//R_X11.so, 
> 6): Library not loaded: /opt/X11/lib/libSM.6.dylib
>    Referenced from: 
> /Library/Frameworks/R.framework/Versions/4.1/Resources/modules/R_X11.so
>    Reason: image not found
> 2: In cairoVersion() :
>    unable to load shared object 
> '/Library/Frameworks/R.framework/Resources/library/grDevices/libs//cairo.so': 
> 
> 
> dlopen(/Library/Frameworks/R.framework/Resources/library/grDevices/libs//cairo.so, 
> 6): Library not loaded: /opt/X11/lib/libXrender.1.dylib
>    Referenced from: 
> /Library/Frameworks/R.framework/Versions/4.1/Resources/library/grDevices/libs/cairo.so 
> 
>    Reason: image not found
> 3: In svg("tst.svg") : failed to load cairo DLL
>  > sessionInfo()
> R version 4.1.0 (2021-05-18)
> Platform: x86_64-apple-darwin17.0 (64-bit)
> Running under: macOS Big Sur 10.16
> 
> Matrix products: default
> LAPACK: 
> /Library/Frameworks/R.framework/Versions/4.1/Resources/lib/libRlapack.dylib
> 
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
> 
> loaded via a namespace (and not attached):
> [1] compiler_4.1.0 tools_4.1.0
>  >
> 
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> R-SIG-Mac using r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-mac


-- 
Brian D. Ripley,                  ripley using stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford