If you're interested in showing photographs and paintings on a classic Mac, I actually made an app for that. It takes modern images, dithers them to 1-bit, and

If you're interested in showing photographs and paintings on a classic Mac, I actually made an app for that. It takes modern images, dithers them to 1-bit, and then exports the results to MacPaint format (encoded in MacBinary for easy transport). It works on modern versions of macOS: https://oaksnow.com/retrodither/ https://oaksnow.com/retrodither/