Abstract / TLDR R-universe now provides MacOS arm64 binaries for all R packages. This means that MacOS users on Apple Silicon hardware (aka M1/M2/M3) can install the very latest builds of any R package without the need for any compilation: install.packages('arrow', repos = c('https://apache.r-universe.dev', 'https://cloud.r-project.org')) R-universe uses cross-compiling for arm64 binaries, though this should not make much of a difference for package authors and R users. Packages with C/C++/Fortran/Rust code are all …