Docker无法识别共享路径：/etc/localtime未共享问题求助

Great question—let's break down why this is happening and walk through the fixes:

Why Sharing /private Isn't Enough #

First, let's clarify the OS X directory structure here:

• /etc on OS X is actually a symbolic link to /private/etc—that part you got right.
• But your /etc/localtime is another symbolic link, pointing to /var/db/timezone/zoneinfo/America/New_York.

The problem? /var is a top-level directory separate from /private, so even though you shared /private, Docker can't access the target of the /etc/localtime link because /var isn't in your shared directories. Docker doesn't automatically resolve cross-directory symlinks outside of shared paths.

Solutions to Try #

1. Mount the Actual Timezone File Directly #

Skip the middle symlink entirely and mount the real timezone file from your Mac into the container:

docker run -v /var/db/timezone/zoneinfo/America/New_York:/etc/localtime:ro [your-image]

The :ro flag makes it read-only, which is the standard way to mount timezone files.

2. Add /var to Docker's Shared Directories #

If you want to keep using the /etc/localtime symlink, add /var to Docker's file sharing list:

• Open Docker Desktop > Preferences > Resources > File Sharing
• Click the + button, navigate to /var, and add it
• Click "Apply & Restart" to save changes

Now Docker can access the /var/db/timezone/... path that /etc/localtime points to, and the symlink will resolve correctly.

3. Use the TZ Environment Variable (Simplest Option) #

Most modern Linux-based containers support the TZ environment variable, which lets you set the timezone without mounting any files at all:

docker run -e TZ="America/New_York" [your-image]

This is more reliable than file mounting, as it avoids symlink and file-sharing quirks entirely.

内容的提问来源于stack exchange，提问作者user1079065