Why does Safari show on my iMac "Safari can't open this page?
When trying to open a page on my iMac and iPhone & iPad. There is a message on my screen. "Safari can't open this page?"
MacBook Pro Apple Silicon
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Is it always the same webpage? If so, it might be an issue with the site itself.
You could try reloading, or a private window (CMD + Shift + N) - If Safari on Mac isn't opening a web page or working as expected – Apple Support