This WebKit error message means the “engine” that powers Safari (and other browsers/apps on iPhone and Mac) has crashed while trying to render a webpage.
Since it is late 2025, this is likely related to the recent December 2025 security updates (iOS 19.x or macOS Sequoia 15.x), which patched several critical WebKit vulnerabilities but have caused stability regressions for some users.
Here is the step-by-step fix, ordered from easiest to most effective.
1. The Quickest Fix (Force Restart)
WebKit errors are often temporary memory glitches.
On iPhone: Force close Safari (swipe up from bottom and pause, then swipe Safari away). Then, restart your phone completely.
On Mac: Force Quit Safari (
Cmd + Option + Esc), then restart your computer.
2. Clear Safari Cache (Most Likely Solution)
Corrupted site data is the most common cause of this crash.
iPhone: Go to Settings > Safari > Clear History and Website Data. Select “All History” and confirm.
Mac: Open Safari, go to Safari (top menu) > Clear History… select “All History” and click Clear.
Also Read : How To Fix Windows Update Error
3. Disable “Hide IP Address”
Recent updates to iCloud Private Relay have caused WebKit crashes on specific heavy websites.
iPhone: Settings > Safari > Hide IP Address > Turn Off.
Mac: Safari > Settings > Privacy > Uncheck “Hide IP address from trackers.”
4. Turn Off Safari Extensions
If you use extensions (like Grammarly, Honey, or AdBlockers), one of them may be incompatible with the latest 2025 WebKit architecture.
iPhone: Settings > Safari > Extensions. Turn them all Off temporarily to test.
Mac: Safari > Settings > Extensions. Uncheck all boxes.
5. Check for the “Rapid Security Response”
Because this error spiked in December 2025, Apple released a small “Rapid Security Response” patch to fix it.
Go to Settings > General > Software Update.
Look for a small update (often labeled like iOS 19.2 (a) or similar) and install it immediately.
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