Bug 302212 – WKWebView Precondition Failure: Unable to load binary archive for shader library

• Status: NEW
• Component: New Bugs

Hello,

When I try to run a WKWebView for MacOS, I get the following error:

precondition failure: unable to load binary archive for shader library: /System/Library/PrivateFrameworks/IconRendering.framework/Resources/binary.metallib, The file file:///System/Library/PrivateFrameworks/IconRendering.framework/Resources/binary.metallib has an invalid format.

==============================

This is the code I use, it's very simple.

ContentView.swift
import SwiftUI

struct ContentView: View {
    var body: some View {
        WebViewControllerWrapper()
            .frame(minWidth: 800, minHeight: 600)
    }
}

struct WebViewControllerWrapper: NSViewControllerRepresentable {
    func makeNSViewController(context: Context) -> ViewController {
        return ViewController()
    }

    func updateNSViewController(_ nsViewController: ViewController, context: Context) {
        // nothing to update
    }
}

==============================

ViewController.swift

import Cocoa
import WebKit

class ViewController: NSViewController {
    var webView: WKWebView!

    override func loadView() {
        webView = WKWebView(frame: .zero)
        self.view = webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        if let url = URL(string: "https://www.apple.com") {
            let request = URLRequest(url: url)
            webView.load(request)
        }
    }
}

macOS Tahoe 26.1

[Alexey Proskuryakov]

Thank you for the report! Could you please clarify if this is a benign warning, or if are observing some issues linked to it?

Hi, I'm getting the same error logged in the console, here's more information:

Library: RenderBox
Subsystem: com.apple.renderbox
Level: error
Message: 
```
precondition failure: unable to load binary archive for shader library: /System/Library/PrivateFrameworks/IconRendering.framework/Resources/binary.metallib, The file file:///System/Library/PrivateFrameworks/IconRendering.framework/Resources/binary.metallib has an invalid format.
```

There's no apparent issues related to the error in my case.