Youre running versions of OS X with very old TLS support for secure network connections, and attempts to access various web sites and secure services will be blocked by remote servers configured to modern security.

Regardless of the clarification, my takeaway was the former: NONE NEEDED.

Antivirus Yosemite Free Antivirus I

I have Bitdefender Antivirus (for mac); I had uploaded a previous free version, or became confused and thought Bitdefender was the same as whatever free antivirus I still have, or do not have, because I did, in fact, have a virus.

BUT AN APPLE TECH SUPPORT AGENT advised me to use whatever anti-virus program he himself loaded for me.

But it works fine and I cannot upgrade to a newer OSX (or its not recommended) and I will lose expensive programs that only work on Snow Leopard andor Yosemite.

It tends to interfere with the computers operation while providing minimal to no benefit unless you work with Windows files.

Antivirus Yosemite Software Or Cleaning

Most long time posters recommend not using antivirus software or cleaning software such as CleanMyMac.

Having said that, I still strongly suggest against the installation of any anti-virus software.

All of those packages only cause problems and offer no additional security.

What might the name of these expensive software packages be Are there any plans to upgrade.

That was the sole virus I have seen in 3 decades of computer use.

Maybe some malware but I get the impression you have to pretty much invite it to come in and install itself and a modicum of cautious behavior goes a long way.

I periodically scan using Malwarebytes (the free version) but it has yet to detect anything.

Free Antivirus For Mac Os Yosemite