This also lets it ‘own’ the whole system rather than just encrypting user data which can be replaced from backups. The most vulnerable target for ransomware is an operating system in which it can modify parts of the system itself, such as its file system, to build its encryption in at a low level. The other side of assessing risk is understanding protection in macOS which is designed to make ransomware fail. If you only read one more article today, please make it that. Thomas has long experience of researching malware on the Mac, and his short history of its rarity and, so far, dismal failure is essential reading. One of the most important steps in assessing risk is to look at the history of that threat. Before going any further, though, you need to assess that risk. Yes, there is always a risk that macOS could be attacked by ransomware. When you lose touch with risk, security measures spiral out of control and your Mac and iOS devices quickly become useless. This is written in the light of Thomas Reed’s strong rebuttal of those claims. As the MacUpdate site has recently published an article which claims that ransomware on the Mac is a serious risk and on the increase, I thought it timely to consider some of the issues. Several of you have already expressed concern about the possibility of ransomware affecting macOS.
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