This marks the greatest change since Apple introduced its ‘behavioural’ flavour of XProtect three years ago in macOS Ventura. XProtect 5354 ventures into new territory, that of blocking potentially malicious code behaviour. Information about malware detected by this engine, including what software was ultimately responsible for downloading it, is used to improve XProtect signatures and macOS security.” That unfortunately excludes all Intel models, leaving them forever vulnerable to the malicious behaviour from which Apple silicon Macs will be protected. As with all climate change, there will be winners and losers.