It’s worth running a scan with MacKeeper just to be sure. If you’re flashing your DNS cache because you’re experiencing problems, you might have malware on your Mac. One solution is to clear your Mac’s DNS cache. But if it gets corrupted, then you can run into problems loading sites, with 404 errors being common. It works quietly in the background, sending you to the right websites when you ask for them.
Most of the time, your Mac’s DNS cache isn’t something you need to worry about.
