Info/Downloads - macOS 10.14.4, Security Update 2019-002 for 10.13.6/10.12.6, Safari 12.1

(See above for revised Security Update 2019-002.) Info and download pages for macOS 10.14.4 Delta/Combo Update and Security Update 2019-002 for macOS High Sierra and Sierra, plus related Apple articles on changes and security fixes in these updates and Safari 12.1. (Also as usual, includes FYI/warning to users of Nvidia's web graphics drivers for High Sierra and Sierra.)