Apple Security Advisory -3 Apple Security Advisory -3 Posted Authored by Apple | Site Īpple Security Advisory -3 - macOS Catalina 10.15.5, Security Update 2020-003 Mojave, Security Update 2020-003 High Sierra are now available and address bypass, code execution, denial of service, double free, information leakage, integer overflow, out of bounds read, out of bounds write, and use-after-free vulnerabilities.