I'm using Raspberry Pi Model B. I've formatted my SD card with SDFormatter, copied NOOBS files onto it and started the Pi. Then it starts setting everything up and in one point it gets this "error writing RiscOS blob". I had no luck in googling the problem so I hope that some of you can help me fix this, please.
Download 'Raspbian with Desktop' (no need to unzip) from https://www.raspberrypi.org/downloads/raspbian/
Flash to sd card using Etcher https://www.balena.io/etcher/
Place sd card in the Pi and turn on.
Once Raspbian is up and running you can use 'Recommended Software' under Preferences to install Mathematica.