I can reproduce the issue and asking myself what is going on, since I am pretty sure it worked flawless on my mac before.
I am a bit short of time the now, will update the PR when I am back.

Ah ok, the linking issue is not present on intel macos.

Ok will retract. There are serious issues with go-deflate: https://github.com/4kills/go-libdeflate/tree/master/v2/native/libs does not contain darwin/arm64 , the libs included can not to be compatible to both musl and glibc based systems. IMO a an questionale approach to bundle binary libs.

I will close. If this comes up we could allow people to provide their own implementations via some sort of Decode(out, in []byte) error. But I personally don't think decode performance is a bottleneck is "real" usage.