I've had unauthorized changes made on my iMac
My operating system is High Sierra 10.13.3. Three (3) times now I have had to have my internet access accounts closed on my iMac computer. Does anyone know how someone is getting into my personal online accounts on my personal Mac? No one else uses it. I am very careful about sites and files. If there is some sort of malware in my mac computer, how can I get it out? Someone suggested ClamXav? I've been an Apple user since 2006 and I've never had any trouble until recently. Thanks!