I just upgraded my laptop to macOS big sur, but then I could not library "rgdal" and "gdalUtils". It threw me an error:

Error: package or namespace load failed for ‘rgdal’ in dyn.load(file, DLLpath = DLLpath, ...): unable to load shared object '/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rgdal/libs/rgdal.so': dlopen(/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rgdal/libs/rgdal.so, 6): Library not loaded: /usr/lib/libpq.5.dylib Referenced from: /Library/Frameworks/R.framework/Versions/4.0/Resources/library/rgdal/libs/rgdal.so Reason: image not found

It worked well under Catalina but not big sur.

Would anyone help me?

1 Answer 1


Same happened to me, but worked after I uninstalled rgdal and reinstalled from source.

install.packages("rgdal", type = "source")

and then restart RStudio

  • Thanks, Bob! It works.
    – Liam Zhong
    Dec 5, 2020 at 21:28

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