Software⏱️ 2 min read📅 2026-05-31

How to Fix: Network Link Conditioner not working on macOS Sierra

Network Link Conditioner not working on macOS Sierra due to compatibility issues with Xcode 8.

Quick Answer: Try updating Xcode to the latest version or using an alternative tool for simulating network conditions.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🚀 How to Resolve This Issue
  3. 💡 Conclusion

After installing the newest version of Network Link Conditioner on macOS Sierra, it doesn't appear to work. It has no effect on your network connectivity, even when set to 100% loss. This issue may be related to Apple not updating NLC for Xcode 8.

⚠️ Common Causes

  • Outdated NLC version or Xcode compatibility issues.

🚀 How to Resolve This Issue

Method 1: Update NLC and Xcode

  1. Step 1: Open the App Store and update Network Link Conditioner to the latest version.
  2. Step 2: Update Xcode to the latest version, ensuring it's compatible with NLC.

Method 2: Use an Alternative Tool

  1. Step 1: Install an alternative network management tool, such as Network Configuration Editor (NCE).

💡 Conclusion

By following these steps, you should be able to resolve the issue and get your Network Link Conditioner working as expected on macOS Sierra.

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