virus or malware: both safari and chrome had homepage taken over by 'playsearch'

Hi I have tried deleting extensions on the browsers and it did not help.

Does anyone have any suggestions. I ended up uninstalling Safari because Chrome appeared to be cleared after deleting extension, but the malware or whatever it is must still be on my computer.. macbook pro. I downloaded Opera and Tor, but I would really like to use Safari. Any ideas on virus software I could use or how to get rid of this Playsearch?

thanks.