Coding⏱️ 2 min read📅 2026-05-31

How to Fix: Xcode 9 Autocomplete Not Working 100% - Partially Working

Xcode 9 autocomplete issues resolved by resetting the Xcode preferences and restarting the IDE.

Quick Answer: Reset Xcode preferences and restart the IDE to resolve the autocomplete issue.

Xcode 9.0 users are experiencing a frustrating issue with the autocomplete box, which is not functioning as expected. The new autocomplete box seems to be partially working, leaving many developers wondering how to restore its full functionality.

🔍 Why This Happens

  • [Cause]

✅ Best Solutions to Fix It

Method 1: Resetting the Autocomplete Settings

  1. Step 1: Go to Xcode Preferences, click on the 'Components' tab, and then select 'Autocompletion' from the dropdown menu.

Method 2: Cleaning the Derived Data

  1. Step 1: Open the Terminal and navigate to your Xcode installation directory.

🎯 Final Words

To completely resolve the issue, try resetting both Autocompletion settings and cleaning your Derived Data. If you're still experiencing issues after trying these steps, consider reaching out to Apple Support for further assistance.

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