From the terminal
which R
will show you the first version in your $PATH
What I did for Quarto/pandoc was to install those separately. q3uarto and pandoc. Then I created a ~/.Renviron file
───────┬──────────────────────────────────────────────────────────────
│ File: .Renviron
───────┼──────────────────────────────────────────────────────────────
1 │ PATH=/Users/ro/.nvm/versions/node/v18.9.1/bin:/opt/homebrew/C
│ ellar/python@3.10/3.10.9/bin:/Applications/CMake.app/Contents
│ /bin:/opt/homebrew/bin:/Users/ro/.cargo/bin:/Applications/Jul
│ ia-1.8.app/Contents/Resources/julia/bin/julia:/usr/local/go/b
│ in:/Users/ro/.fig/bin:/usr/local/mysql-8.0.28-macos11-x86_64/
│ bin:/bin:/usr/bin:/usr/local/bin:/usr/sbin:/sbin:/Users/ro/.l
│ ocal/bin
2 │ R_INCLUDE_DIR=/Library/Frameworks/R.framework/Resources/inclu
│ de
3 │ R_LIBS_SITE=/Library/Frameworks/R.framework/Resources/library
│
4 │ R_LIBS_USER =/Library/Frameworks/R.framework/Resources/librar
│ y
5 │ RSTUDIO_PANDOC=/usr/local/bin/pandoc
6 │ RSTUDIO_QUARTO=/usr/local/bin/quarto
7 │
───────┴──────────────────────────────────────────────────────────────
where $PATH is taken from the terminal command
echo $PATH