Malware Removal Software

Do not use third party apps that claim to clean, protect, manage, boost performance, etc.

Your Mac does not have a "virus". It may have a third party malware or adware installed.

You can try changing the default search engine in Safari. You can try removing Safari extensions. Try shutting down Safari then while pressing and holding the shift key launch Safari. This will start Safari in a clean state.

You can try using MalwareBytes to find malware on your computer.

KENTLAKES wrote:

Does anyone know if the software 'SpyHunter' for Mac is legitimate and does it find the virus 'Safari redirect to Yahoo.

Never heard of it...

If you suspect you have installed adware/malware:

>System Preferences>Profiles click into it and then remove all the suspicious things from the list. (This Preference pane will not be present if no profiles found.)

also Verify you are not using SOCKS proxy:

>System Preferences>Networks>Advanced>Proxy uncheck the box

Adware/malware launch daemons can set SOCKS proxies without user participation.

(SOCKS is an Internet protocol that exchanges network packets between a client and server through a proxy server.)

Adware Removal Guide—Manual removal of : http://www.thesafemac.com/arg-identification/

or

Try running this trusted utility: https://www.malwarebytes.com/mac/