Managed to find a way to easily and reliably mount a BTRFS volume on my mac. So now I can use BTRFS on the backup systems and still have the ability to plug-in a chonky disk directly to my laptop.
https://github.com/nohajc/anylinuxfs
AnyLinuxFS was the solution with the least headaches. Easy to install under HomeBrew. Needed a few tweaks on the mount command to side-step some permissions issues unique to BTRFS...
sudo anylinuxfs /dev/disk5s1 ~/24TB --nfs-export-opts rw,no_subtree_check,all_squash,anonuid=0,anongid=0,insecure -n noowners
This little tool essentially builds a tiny Virtual Machine that talks to the disk directly then shares as an NFS mount to your Mac. And it's sooooooooo much easier than all the bollocks I tried with spinning up Ubuntu in Docker or UTM or whatever.
Can recommend.
