Remove DuckDuckGo from the browser you use
To remove DuckDuckGo from Safari, start by opening Safari’s settings in the menu bar under Safari > Settings, or Preferences on older macOS versions. Then click the Search tab. In the Search Engine dropdown, you will see DuckDuckGo listed if it is currently your default. Click the dropdown and choose Google, Bing, Yahoo, Ecosia, or any other built-in provider you prefer. That single change in Safari does not affect other applications, so if you also want to adjust Chrome, you will need to follow the steps to remove DuckDuckGo from Google Chrome separately. On a Mac, the process is slightly different for Apple’s own client. You can follow the specific guide to remove DuckDuckGo from Safari on mac if you run into trouble, but the direct setting change is usually all that is needed. Before you make any manual changes, though, check whether you installed a privacy app recently. A VPN, cleaner, or security tool often sets DuckDuckGo as the default engine across every web client. Uninstalling that app can revert each one to its original search engine at once. That trick saves you from having to tweak every program individually. The only sure way to stop a third-party tool from hijacking your search is to remove the root application that enforces the setting.
Stop Yahoo from taking over your searches
When Yahoo keeps reappearing as your search engine, the root cause is rarely a virus. It is usually a privacy app you deliberately installed, such as a VPN, cleaner, or security suite that set DuckDuckGo as the default. Uninstalling that app from your Mac or PC may stop Yahoo from taking over your searches, but you should also check your browser's search engine settings and extensions. If you need to get rid of Yahoo search in Firefox specifically, the same app uninstall usually fixes it there too, because the app configured the program's settings globally. A common culprit is security software, which sometimes resets your search engine to Yahoo after an update. If you see Yahoo keep opening in Chrome with McAfee, removing the security software or turning off its browser extension in Chrome's settings may prevent the swap from happening again. Safari's sync feature can also reintroduce Yahoo. After you remove the app, go to Safari > Settings > Search and set your preferred engine from the Search Engine dropdown. Then check your other devices to ensure the change sticks across them. Unlike a competitor's page, we can tell you that the problem originates from a trusted application you chose to install, not malware, so targeting the app itself rather than fighting your browser settings repeatedly will save you time.
Find and remove the source of the redirect
When Safari keeps switching your default search engine back to DuckDuckGo, the cause is almost always a separate program installed on your Mac. It is not a setting inside Safari itself. To stop the redirect, you need to find and remove that external program. Open your Applications folder and look for any recently installed privacy tools you may have forgotten about. Common culprits are VPN clients, system cleaners, or ad-blocking utilities that bundle DuckDuckGo as a "feature." If you downloaded a privacy suite or a browser extension manager last week, that is likely where you introduced the DuckDuckGo browser hijacker from a download. Check your LaunchAgents folders in Finder and Login Items in System Settings as well. A profile installed by an app can force the search engine change even after you quit the app. Once you identify the program, drag it to the Trash and restart Safari. DuckDuckGo is not a virus but a setting applied by an app you chose to install. Removing that single application usually reverts the search engine back to your preferred option across all web clients at once. You will not need to tweak Safari's preferences manually. Unlike other guides that only reset your Safari homepage, this fix stops the override at its source so the change survives future restarts.
