macOS AirPlay Error Code 3146: How to Fix It

Medium 20-45 minutes Medium Severity Verified July 2026
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Error Code
3146
Brand
macOS
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
20-45 minutes
macOS AirPlay Error Code 3146 indicates that your Mac failed to complete a handshake with an AirPlay-compatible receiver, such as an Apple TV, AirPlay 2 speaker, or smart TV. This handshake is the initial communication that establishes a secure, authenticated connection between your Mac and the target device. The error is typically caused by network mismatches, firewall restrictions, outdated software, or temporary connectivity glitches, and in most cases it can be resolved without professional help.
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Tools You'll Need

How to Fix Error Code 3146

  1. Restart All Involved Devices

  2. Confirm Both Devices Are on the Same Wi-Fi Network

  3. Update macOS and AirPlay Receiver Firmware

  4. Check and Adjust macOS Firewall Settings

    Do not leave your Mac firewall permanently disabled. Re-enable it after testing and configure specific allow rules instead.

  5. Forget and Reconnect to Wi-Fi

  6. Flush the DNS Cache and Reset Network Services

    You need administrator access to run this command. Do not modify any other Terminal commands unless you are confident in what they do.

  7. Sign Out and Back Into AirPlay on the Receiver

  8. Disable VPN or Proxy Connections

  9. Reset the AirPlay Access Code on Apple TV

  10. Create a New Test User Account on macOS

    Back up your Mac with Time Machine before deleting preference files. Removing the wrong file could affect other system behaviors.
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When to Call a Professional

Contact Apple Support or visit an Apple Store if Error Code 3146 persists after completing all steps above, especially if AirPlay fails across multiple networks and multiple receiver devices. This may indicate a deeper macOS system file corruption, a hardware-level Wi-Fi module issue, or an account-level authentication conflict that requires Apple diagnostics tools to diagnose. You should also contact your network administrator if you are on a managed corporate or school Wi-Fi network, as those environments often block the Bonjour and mDNS protocols that AirPlay requires.

Frequently Asked Questions

What does macOS AirPlay error code 3146 mean?
Error code 3146 means macOS failed to complete the AirPlay handshake — the initial security and authentication exchange between your Mac and an AirPlay receiver like an Apple TV or smart TV. It is usually caused by a network mismatch, firewall blocking, outdated software, or a temporary glitch in the mDNS/Bonjour discovery service.
Why does my AirPlay keep showing error 3146 even after restarting?
If a simple restart does not resolve error 3146, the cause is likely more persistent — such as a VPN interfering with local network traffic, a firewall rule blocking AirPlay ports, both devices being on different network bands (2.4 GHz vs 5 GHz), or a corrupted macOS network or user preference file. Work through the full troubleshooting steps, particularly checking firewall settings and flushing the DNS cache.
Does AirPlay error 3146 mean my Apple TV is broken?
Not necessarily. Error 3146 originates on the Mac side during the handshake attempt. Your Apple TV is likely fine. The error most often reflects a network configuration issue, an outdated macOS version, or a software glitch. Try toggling AirPlay off and on in your Apple TV settings and ensuring both devices are on the same Wi-Fi network before assuming hardware is at fault.
Can a VPN cause AirPlay error code 3146?
Yes. A VPN routes your Mac's internet traffic through a remote server, which takes it off the local network that AirPlay requires. Since AirPlay uses Bonjour to discover receivers on the same local network, an active VPN can completely prevent the handshake from succeeding. Disable your VPN before using AirPlay, or configure your VPN with split-tunneling to exclude local network traffic.
What ports does AirPlay use, and how do I unblock them on macOS?
AirPlay primarily uses TCP port 7000 (AirPlay streaming), TCP port 7100 (AirPlay mirroring), and UDP port 5353 (Bonjour/mDNS for device discovery). To unblock them on macOS, go to Apple Menu > System Settings > Privacy & Security > Firewall > Firewall Options and ensure no rules are blocking these ports. You can also temporarily disable the firewall to test, then re-enable it and add specific allow rules for AirPlay.

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