Install units package on MacOSX

In terminal:

brew install udunits
or
brew reinstall udunits

cd /opt/homebrew/Cellar/udunits/
ls

You will see something like:
2.2.28

Then, in R:

install.packages("units", configure.args = c("--with-udunits2-include=/opt/homebrew/Cellar/udunits/2.2.28/include", "--with-udunits2-lib=/opt/homebrew/Cellar/udunits/2.2.28/lib"), type="source")



And it works !

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