Idea behind Rga is cool.
Anyway, I tried it on Mac and installed via Homebrew. The formula already says it depends on ripgrep (that's fine since I have ripgrep already installed and use it regularly). I still was surprised when I executed Rga for the first time and got an error message that 'pdftotext' was not found. Since pdftotext has been officially discontinued, I am not sure if I want to install an old version just to make Rga work on my machine. Don't think it's an good idea to rely on a project which is not maintained actively.