Website doesn't work due to WebGL issue

Question

Level 1

8 points

Website doesn't work due to WebGL issue

I have a 2024 Mac Mini, with macOS 26.0.1. When I use Safari to go to www.blackhillsenergy.com, then click on the Log In button, I am presented with an entirely blank page. Opening the Web Inspector, I see an error "ReferenceError: Can't find variable: WebGLRenderingContext"

The page works fine in Firefox on my Mini. It works fine in Safari on my iPhone, iPad, and my daughter's MacBook.

There's clearly something wrong with Safari on my Mini.

Any suggestions as to things to try to fix this?

Mac mini, macOS 26.0

Posted on Oct 9, 2025 1:10 PM

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Answer 1

John Galt

Level 10

155,246 points

Oct 9, 2025 8:22 PM in response to Ambiorickx

Try clearing Safari's history and / or saved website data:

Clear your browsing history in Safari on Mac - Apple Support

You might not have to clear all history. In most cases clearing only the past hour is sufficient.

Clear cookies in Safari on Mac - Apple Support

For what it's worth that website loads ok on the Mac I happen to be using at the moment. I realize that doesn't help you. WebGLRenderingContext is a commonly used graphical API so the message in itself is not very helpful. All it means in your case is that the page can't even begin to load.

For an overly broad reference with a few helpful suggestions: If Safari doesn't open a page or work as expected on Mac - Apple Support. Don't arbitrarily dismiss them. Some are more useful that others.

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Answer 2

Ambiorickx Author

Level 1

8 points

Oct 10, 2025 7:44 AM in response to John Galt

Thanks, but none of these helped.

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