Borgbackup missing FUSE dependency on Darwin

[starptr]

Describe the bug

Using borg mount fails on an arm Mac machine I have:

Runtime Error: borg mount not available: no FUSE support, BORG_FUSE_IMPL=pyfuse3,llfuse.

Steps To Reproduce

Steps to reproduce the behavior:

1. Install borgbackup
2. Mount a repo with borg mount REPO MOUNTPOINT

Expected behavior

Borg should successfully mount the repo. (Although I have not tried it myself, the current borg package distributed in Homebrew appears to do so successfully, according to https://github.com/borgbackup/borg/issues/5522.)

Screenshots

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Additional context

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Notify maintainers

@dotlambda @globin

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"aarch64-darwin"`
 - host os: `Darwin 23.2.0, macOS 14.2.1`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.18.5`
 - channels(root): `"nixpkgs"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

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[Atemu]

macOS does not ship a FUSE driver. You must install one yourself.

Last time I used a mac the only driver available was osxfuse which is a proprietary kernel extension, so I noped out of that.
I saw a NFS-based implementation a while ago but I don't know what became of that.

Nix manages userspace components. Kernel components are only touched via NixOS and that's not a thing on macOS.