possible malware/adware
My computer : Mac mini running Mojave. My question- how would I know if there has been malicious attachments downloaded while searching on safari? I have noticed unusual behavior (which I screenshot) and contacted apple support. As a result, a re-installation of Mojave was done. I have found that still a couple of quirks still occasionally occur so I decided to check the cookies in my privacy settings. There were some that did not have names to them so I googled them. The search result said adware. (attachment added) This brings me to my next questions- Do I need to install a adware/malware cleaning app, and are they safe to download? Also, by updating to Catalina, would that delete any malware (if any was there)? Hope I attached links properly.
Thank for any info you can provide.
MR