macOS Catalina 10.15.4 Supplemental Update patches some blatent bugs and undisclosed security flaws in Apple’s recently released update for its flagship Mac operating system, although it’s not clear that major crashing bugs have been fixed yet. macOS Catalina 10.15.4 supplemental update improves the stability and security of your Mac. Fixes an issue where Mac computers … Continue reading "macOS Catalina 10.15.4 Supplemental Update"