Have you got loads of browser extensions running? In Safari, go to Preferences > Extensions and uninstall the lot and reinstall the vital ones one at a time.
Or could someone be hogging bandwidth? If it is only your Mac, is Software Update downloading in the background? Could something else be running?Īlso, go to Safari > Reset Safari… and tick every box. Is it slow on every computer in your house? If so, it could be to do with the network or internet connection as opposed to your Mac.
