act bind mount "no such file or directory" running Actions locally

act mounts host paths into the container (your repo, and any paths a step binds). Docker refuses the mount when the host path does not exist or is outside the directories Docker Desktop is allowed to share.

What this error means

act fails with "invalid mount config" or "bind source path does not exist" / "no such file or directory" when creating the job container.

act

docker: Error response from daemon: invalid mount config for type "bind":
bind source path does not exist: /Users/dev/project/artifacts

Common causes

The host path does not exist yet

A step binds a directory that a previous step was supposed to create, but it is not there when the mount happens.

The path is not shared with Docker Desktop

Docker Desktop only mounts paths under its configured file-sharing roots; a path outside them cannot be bound.

How to fix it

Create the path or add it to file sharing

Ensure the host directory exists before the step that mounts it.
In Docker Desktop Settings, Resources, File Sharing, add the parent directory.
Re-run act after applying the sharing change.

Terminal

mkdir -p ./artifacts
act -j build

Keep mounted paths inside the repo

Bind paths within the working tree so they fall under an already-shared root.

How to prevent it

Create directories before steps that bind-mount them.
Add project roots to Docker Desktop file sharing.
Prefer paths inside the repository for local mounts.