Do you know if there is any work being done to support a Metal backend for Futhark? That would be interesting for local prototyping on macOS. I've found a fork[1], but it doesn't seem to have been updated since February.
That’s a shame. I think since M1, macOS is very slowly starting to become a more popular platform for ML thanks to the unified memory. A mac is probably the cheapest and easiest way to get access to 64GB+ of memory available to a GPU on a local machine.