Flash Shim Software Image to microSD

Hi there,

I’m curious if I can download an image of the Shim software to flash to my microSD. I use my raspberry pi to run a bitcoin node–a very basic setup. I don’t have the ability to download the software directly to the pi and so when I try downloading to my mac I get this error:

sudo: ./install.sh: command not found

I apologize if this is a super beginner question. Definitely not the most technical person!

Thanks in advance.