There were a few macOS related bug reports on the bug tracker which
have been open for years without a volunteer caring for them. The
GitHub actions build has also been broken for a long time due to bugs
in the ancient LLVM toolchain shipped with macOS, making macOS an
unsuitable non-Linux target for testing MPD's portability.
All of this makes macOS support an annoying liability for me. To
avoid more frustration, I'm hereby dropping macOS support completely
from MPD. Maybe this causes enough pain for a new maintainer to
spawn, but maybe nobody cares, so... let's see.
