Hi there,
I'm super sorry, I don't know how I missed this message 😥
SpriteMancer is built for x64 systems, so that's probably why you are being unable to run it. I'm unfamiliar with Parallels though, so I might be wrong. Your best chance would be to ask in the Discord community in case there's someone else that managed to get it working.
https://discord.gg/azdqRf8