It's been Sherlocked: https://github.com/r-lib/rig/ so ima archiving the project.
The next iteration of RSwitch (macOS 11+)
ln -s /Applications/RSwitch.app/Contents/SharedSupport/rswitch-cli /usr/local/bin/rswitchUSAGE: r-switch [<vers>] [--arch <arch>] [--silent]
ARGUMENTS:
<vers> R version. e.g. 4.1
OPTIONS:
-a, --arch <arch> Architecture. arm64|x86_64. Defaults to system architecture.
-s, --silent No output after performing the switch.
-h, --help Show help information.
Example:
$ rswitch 4.1
R version 4.1.2 (2021-11-01) -- "Bird Hippie"
Copyright (C) 2021 The R Foundation for Statistical Computing
Platform: aarch64-apple-darwin20 (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under the terms of the
GNU General Public License versions 2 or 3.
For more information about these matters see
https://www.gnu.org/licenses/.