Fix 4: Change DNS ServersĪ famous DNS Server is able to increase Safari's capability of locating the file's download server. Or, if you have no other device using your Wi-Fi, it's highly possible that unauthorized devices use your internet in secret, and you'd better remove them from your user list for fast Wi-Fi speed and security. You can stop these devices to use the Wi-Fi when you're downloading on the Safari browser. If the upload/download speed and upload/download responsiveness are fast, your download speed is still slow, then it's likely that other devices swallow up your Wi-Fi bandwidth. This operation only takes several seconds. Wait for the Terminal to run this command line, and then you can know your internet quality.Run the following command line in the Terminal window and then hit Enter.Launch the Terminal app via Home Folder on Mac or Finder.
