Apple Releases macOS Catalina 10.15.5 Supplemental Update With Security Fix

Apple today released a supplemental update for macOS Catalina 10.15.5, the fifth update to the ‌macOS Catalina‌ operating system that was released in October 2019. The supplemental update comes a week after the release of the macOS Catalina 10.15.5 update.
‌‌macOS Catalina‌‌ 10.15.5 is a free update that can be downloaded from the Mac App Store using the Update feature in the System Preferences app. There's also a security update for those running macOS High Sierra.