FS sync, may it be for the code, the assets, the data, the logs, is painfully slow on osx, because of vboxsf poor performance.<p>If you intend to use docker containers on osx as an isolated runtime, with all your &quot;data&quot; sync&#x27;d in realtime between your host and your container, then use linux.<p>Fswatch &#x2F; Rsync &#x2F; unison over NFS, ssh or cifs are hacks of a greater order than having to source an env script.<p>Out of curiosity, why would you need directional sync&#x2F;unison?