I have no idea what the problem was, but in the end, deleting my NordVPN app worked when none of the other solutions made any difference. Then went back to my main profile to start the process of migrating that account data to the new account, only to notice that the wifi was back to being fast on my old profile too now! To access Internet Speed, Wi-fi Performance & Bandwidth Analysis, please click on the ‘Network. Dont forget your internet connection is not symmetrical (same data rate up & down) must are. As it is running you can see what their current download/upload speeds and sizes are. The Trouble with iTunes on the Mac and Windows. So I deleted NordVPN, and the wifi was working fast on the new profile. When the Internet is running slow, open the Bandwidth Analysis feature, select all the devices that are currently online and run the test for a couple of minutes.

I looked up info about the popup and apparently it's another known issue on Macs, and the only solution is to uninstall the VPN. Sure enough, the wifi was back to being fast. When I created a new profile, I got an incessant popup that asked me to login to a VPN account (I have NordVPN but it wasn't running at the time and I barely use it) - this popup was blocking my access to my wifi though! So I rebooted in safe mode and logged into the new profile. I went through every link on every result from Google by others who had this issue and nothing worked for me.Ī user in one of the Apple threads suggested creating a new user profile, because that had worked for them.