How to back up to a NAS from Mac

Complete guide with multiple methods and troubleshooting for backing up to a NAS from Mac.

7-10 min read
Expert Verified
Last Updated: August 2025

Quick Answer

Backing up to a NAS (Network Attached Storage) from a Mac can be accomplished using various methods such as Finder, Time Machine, or third-party applications. This guide will provide detailed instructions for each method to ensure a seamless backup process.

Medium⏱ 7-10 min read

Prerequisites & Requirements

Before you begin backing up to a NAS from your Mac, ensure you have the following:
  • •macOS version: Ensure you are running macOS Mojave (10.14) or later for optimal compatibility.
  • •Network: A stable network connection to the NAS device.
  • •Permissions: Ensure you have read/write access to the NAS share.
  • •NAS Configuration: The NAS should be properly configured and connected to the same network as your Mac.
  • •Backup Data: Identify the data you wish to back up, such as documents, photos, and applications.

Method 1: Using Time Machine

Time Machine is the built-in backup feature of macOS that allows you to back up your entire system to a NAS. This method is ideal for users who want a comprehensive backup solution.
  • •Step 1: Open 'System Preferences' from the Apple menu () > Click on 'Time Machine'.
  • •Step 2: Click 'Select Disk...' and choose your NAS from the list of available disks. If your NAS is not listed, ensure it is connected to the network and accessible.
  • •Step 3: Click 'Use Disk' and enter your NAS credentials if prompted.
  • •Step 4: To verify the backup, go back to the Time Machine preferences and ensure the backup status shows 'Backing Up'. You can also enter Time Machine by clicking the Time Machine icon in the menu bar and selecting 'Enter Time Machine'.

For macOS Monterey (12) and later

In macOS Monterey and later, Time Machine has improved network backup capabilities.
  • •Ensure your NAS supports SMB (Server Message Block) as Time Machine prefers this protocol.
  • •You can also set up a backup schedule by checking 'Back Up Automatically' in the Time Machine preferences.

For macOS Big Sur (11) and earlier

Older versions of macOS may have slightly different Time Machine settings.
  • •Make sure to enable 'Connect using SMB' in the NAS settings if you encounter issues.
  • •You may need to manually mount the NAS share before selecting it in Time Machine.

Method 2: Using Finder

You can manually copy files to your NAS using Finder. This method is useful for selective backups.
  • •Step 1: Open Finder and click on 'Go' in the menu bar > Select 'Connect to Server...' (or press Command + K).
  • •Step 2: Enter the NAS address (e.g., smb://192.168.1.100) and click 'Connect'.
  • •Step 3: Enter your NAS credentials if prompted, then select the shared folder you want to back up to.
  • •Step 4: Drag and drop files or folders from your Mac to the NAS folder. To verify, check the file size and last modified date on the NAS.

Troubleshooting Common Issues

If you encounter problems while backing up to a NAS, consider the following solutions:
  • •Error: 'Connection Failed' - Solution: Check your network connection and ensure the NAS is powered on and connected.
  • •Issue: 'Insufficient Permissions' - Fix: Verify that your user account has read/write access to the NAS share.
  • •Problem: 'Backup Failed' - Workaround: Restart your Mac and NAS, then attempt the backup again.

Advanced Tips & Shortcuts

Enhance your backup experience with these advanced tips:
  • •Keyboard shortcut: Command + Shift + K - Opens the 'Connect to Server' window quickly.
  • •Command line: Use 'rsync' in Terminal for advanced file synchronization - Example: rsync -avh /path/to/source /path/to/destination.
  • •Hidden feature: Enable 'Show Time Machine in menu bar' for quick access to backup options.

Common Mistakes to Avoid

Avoid these common pitfalls:

Expert Tips

For the best backup experience, consider using Time Machine for automated backups and Finder for selective file transfers.