How to Flush DNS Cache in MacOS Catalina & Big Sur

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MacOS users may occasionally need to flush DNS cache on their Macs in order to access certain websites, domains, or for troubleshooting purposes. Flushing DNS cache is particularly common with web developers and network admins, but it’s used with some regularity by other advanced users too. This guide will walk through how to flush DNS cache in MacOS Big Sur and MacOS Catalina.

If you’re unable to access a website that you visited recently, then of course the first thing you’d check is whether you have a working internet connection. But if you’re only…

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