OSX.PROTON - Infected thousands of Apple computers in 2017 designed to steal user's account credentials by accessing the macOS Keychain app.

OSX/KitM.A virus - Infected a small number of Apple computers in May 2013 designed to take screenshots of a user's desktop and upload to one of several websites.

Flashback malware - Infected over 600,000 Apple computers in April 2012 designed to steal user's personal information, including account login credentials.

Several examples of viruses that have infected Apple Macintosh computers include the following. For the sake of simplicity, 'virus' will be used on this page and refers to either a virus or malware. Don't put any usernames or passwords in to any site you did not navigate to manually for example, don't follow email links.The term 'virus' and 'malware' are often used interchangeably. As far as social engineering, don't be stupid. MacOS does not have anything like Windows VSS so how successfully tools like McAfee's ability to remediate threats on macOS should be taken with a grain of salt. Don't bother trying to recover any data locally, use your remote backup to recover your files. If you think your device is infected reinstall macOS, don't risk it. In the event you go get your device infected, wipe the disk and reinstall macOS (same goes for Windows). DO NOT SAVE ANYTHING LOCALLY without a backup, iCloud/OneDrive/GoogleDrive work great for this.

Do not approve anything you do not recognize, especially if you did not initiate the action that caused the notification. If you get a warning, read it and listen to it, GOOGLE IS YOUR FRIEND. If you override and allow a malicious application to run it does not matter if you have an Anti_Virus or not. Don't tell macOS its safe to run something macOS warns you about unless you are absolutely sure its legit. The biggest and most significant attack vector has been and always will be the user. MacOS has xProtect, gatekeeper, and a heavy leaning on Notorization with backup from PPPC to keep macOS safe. Windows as Windows Defender and UAC which do a decent enough job at keeping your Windows PC 'safe'.

In this day in age Anti_Viruses are really no longer needed.

How to check your macbook for viruses