A reference for recurring macOS-specific instructions.
R + Java
This depends on how Java was installed (package manager versus direct download).
1. Terminal
# Homebrew
brew info openjdk
ls /opt/homebrew/opt/openjdk # expected installation location
brew --prefix openjdk # prints actual installation path (should be /opt/homebrew/opt/openjdk)
brew list | grep openjdk
# Look for installations on the computer
/usr/libexec/java_home -V # list all Java installations on the computer
# R CMD javareconf # R reconfiguration
export JAVA_HOME=/Library/Java/JavaVirtualMachines/temurin-21.jdk/Contents/Home # output either from /usr/libexec/java_home -V or brew --prefix openjdk
sudo R CMD javareconf # R reconfiguration with admin privileges2. R
# Then restart R session!
install.packages("rJava") # should work nowR + gettext
You might receive an error related to gettext when installing an R package.
1. Terminal
# Install gettext with Homebrew
brew install gettext
# Update Makevars
cd ~/.R
ls
nano Makevars # or whatever text editorIn Makevars, add the following lines:
LDFLAGS += -L/opt/homebrew/opt/gettext/lib
CPPFLAGS += -I/opt/homebrew/opt/gettext/includeSave the update and close the text editor
2. R
# restart R and retry the installation
install.packages("iCantRememberTheNameOfThePackageIhadThisIssueWith")