Supplemental Update 2 released for macOS Mojave, Sierra and High Sierra

What you need to know

  • Apple has released Supplemental Update 2 for macOS Mojave.
  • Addresses purported vulnerability against a "remote attacker".
  • Comes in wake of rumors that macOS Catalina could be launched on October 4.

Apple has released Supplemental Update 2 for macOS Mojave. The update, for version 10.14.6 was made available yesterday, and provides a security update to Apple's latest macOS operating system. The security update is also available for macOS Sierra 10.12.6 and macOS High Sierra 10.13.6.

Security notes for the update state:

  • Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and macOS Mojave 10.14.6
  • Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution
  • Description: An out-of-bounds read was addressed with improved input validation.

The security update comes admidst speculation that Apple's next macOS instalment, Catalina, will be released on Friday October 4 following an update to the company's Danish website. Apple has not given an official release date for macOS Catalina. You can find out everything you need to know about macOS Catalina here

To download the latest supplemental security update, just head to Software Update inside System Preferences on your Mac and selected "update now".

Stephen Warwick
News Editor

Stephen Warwick has written about Apple for five years at iMore and previously elsewhere. He covers all of iMore's latest breaking news regarding all of Apple's products and services, both hardware and software. Stephen has interviewed industry experts in a range of fields including finance, litigation, security, and more. He also specializes in curating and reviewing audio hardware and has experience beyond journalism in sound engineering, production, and design. Before becoming a writer Stephen studied Ancient History at University and also worked at Apple for more than two years. Stephen is also a host on the iMore show, a weekly podcast recorded live that discusses the latest in breaking Apple news, as well as featuring fun trivia about all things Apple. Follow him on Twitter @stephenwarwick9