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  • Post published:21/10/2021
  • Post last modified:21/10/2021
Security Update 2021-006 Released for MacOS Catalina

MacOS Catalina updateMacOS Catalina update

Apple has released Security Update 2021-006 for macOS Catalina users.

Security Update 2021-006 Catalina includes important security fixes for macOS Catalina and is recommended to install for all users eligible for that update.

Separately, Apple released iOS 12.5.5 for older iPhone and iPad models with the same security fixes.

Installing Security Update 2021-006 Catalina on Mac

Security Update 2021-006 Catalina is available for Macs running macOS Catalina only.

It is a good idea to backup the Mac before installing any software update.

  1. From the  Apple menu, go to System Preferences and choose “Software Update”
  2. Install ‘Security Update 2021-006 Catalina’ on the Mac

The Mac must reboot to complete installation.

Additionally, Mac users who haven’t yet updated to Safari 15 will find that available for MacOS Catalina as well.

Newer Macs or those choosing to run Big Sur will instead find macOS Big Sur 11.6 as the most recent update available.

Let us know if you have any notable experiences with installing the security update.

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