The truth is, you cannot simply "convert" an RAR file into a PKG file with the click of a button. They serve entirely different purposes. However, you can extract the contents of an RAR archive and then repackage those contents into a PKG.
What Is a RAR File and How Do I Open It? ... RAR files are used to combine and compress multiple files when sending them together. rar to pkg
and navigate to the directory containing the extracted files. The truth is, you cannot simply "convert" an
If the extracted content is already a .pkg file, the RAR was simply a "wrapper" used for downloading. What Is a RAR File and How Do I Open It
To get the files out of the RAR container, you need an extraction tool. Do not use the built-in macOS Archive Utility (it fails on multi-part RARs).