How do I fix Safari Web Inspector Crash in macOS Tahoe 26.2?

Three approaches in order of safety: (1) Clear Safari Global Preferences; (2) Reset WebKit Cache. Full Terminal commands and System Settings paths are inside each section.

Is this fix confirmed for macOS Tahoe 26.2?

Yes — verified on macOS Tahoe 26.2. Article is updated when Apple ships a point release that changes the symptom or fix.

How to Fix Safari Web Inspector Crash in macOS Tahoe 26.2

Symptom: Safari on macOS Tahoe crashes instantly when opening the Web Inspector (cmd+opt+i) or trying to inspect elements on complex web apps.

TL;DR fix

Start with Fix 1: Clear Safari Global Preferences. If the issue persists after that, try Fix 2: Reset WebKit Cache. Full Terminal commands and step-by-step instructions are in each section below.

Why this happens

A conflict between Tahoe's new GPU acceleration for developer tools and certain legacy WebKit cached preferences.

Recommended Troubleshooting Tool

Before proceeding with manual fixes, we recommend using CleanMyMac X. Excellent for clearing Safari caches, bloated databases, and stuck background processes.

Fix 1: Clear Safari Global Preferences

Quit Safari.
Open Terminal.
Run the following command:

defaults delete com.apple.Safari WebKitDeveloperExtrasEnabledPreferenceKey

Relaunch Safari.

Fix 2: Reset WebKit Cache

In Terminal, run:

rm -rf ~/Library/Containers/com.apple.Safari/Data/Library/Caches/com.apple.Safari.SafeBrowsing

Restart your Mac.

Recommended Tool: Dash

If you do a lot of dev work on macOS:

- Get Dash for offline documentation and snippet management to reduce reliance on Inspector for repeated lookups.

Tested and documented by the MacDebug team — about MacDebug. See also Safari Freezing or Crashing on macOS Tahoe 26.2, VoiceOver Not Working Properly in Safari on Sequoia, or browse all guides on macdebug.