You can use macOS Recovery, your computer's built-in recovery system, to reinstall the Mac operating system. Reinstalling macOS doesn't remove your personal data....
Learn how to set up and use macOS . Find all the topics, resources, and contact options you need for macOS ....
Find answers with millions of other macOS Sierra users in our vibrant community. Search discussions or ask a question about macOS Sierra ....
This document describes the security content of macOS Sierra 10.12 .
Learn about the macOS Cryptographic Modules: Apple macOS CoreCrypto Module v7.0 and Apple macOS CoreCrypto Kernel Module v7.0....
My question is if my MacBook Air (11-inch, Mid 2012) can be updated to a newer macOS such as macOS Sierra 10.12 ? At the moment I have OS X El Capitan 10.11 (not compatible with nordVPN app) I need at least this version of macOS Sierra 10.12 because my nordVPN APP won'y download with an older version. Thank you for your help!...
I have a Mid 2011 iMac and i'm trying to update from macOS Sierra Version 10.12.6 to HIGH SIERRA . However, I keep getting this error when I install and it attempts to restart my computer "An error occurred while preparing the installation. Try running this application again." Can you help me figure this out?...
I am trying to update from macOS 12 Sierra to macOS 13 High Sierra , but on the Apple App Store I am getting this message: This copy of the install macOS High Sierra.app application is damaged, and can't be used to install macOS . What can I do? Any suggestions or advice welcome! Thanks!...
I have a MacBook Air 13 inch, mid 2012 running macOS Sierra version 10.12.6 and I’m trying to upgrade to macOS Catalina through Software update and also the App Store. Neither are showing any available macOS updates. How can I update to Catalina?...
This document describes the security content of macOS High Sierra 10.13.3, Security Update 2018-001 Sierra , and Security Update 2018-001 El Capitan....
This document describes the security content of macOS High Sierra 10.13.6, Security Update 2018-004 Sierra , Security Update 2018-004 El Capitan....
This document describes the security content of macOS High Sierra 10.13.2, Security Update 2017-002 Sierra , and Security Update 2017-005 El Capitan....
This document describes the security content of macOS High Sierra 10.13.4, Security Update 2018-002 Sierra , and Security Update 2018-002 El Capitan....
This document describes the security content of macOS High Sierra 10.13.1, Security Update 2017-001 Sierra , and Security Update 2017-004 El Capitan....
This document describes the security content of macOS High Sierra 10.13.5, Security Update 2018-003 Sierra , Security Update 2018-003 El Capitan....
This document describes the security content of macOS Sierra 10.12.3.
The macOS Sierra 10.12.6 update improves the security, stability and compatibility of your Mac, and is recommended for all users....
The macOS Sierra 10.12.5 update improves the stability, compatibility, and security of your Mac, and is recommended for all users....
The macOS Sierra 10.12.3 update improves the stability, compatibility, and security of your Mac, and is recommended for all users....
The macOS Sierra 10.12.1 update improves the stability, compatibility, and security of your Mac, and is recommended for all users....
This document describes the security content of macOS Sierra 10.12.1, Security Update 2016-002 El Capitan, and Security Update 2016-006 Yosemite....
The macOS Sierra 10.12.4 update improves the stability, compatibility, and security of your Mac, and is recommended for all users....
The macOS Sierra 10.12.2 update improves the stability, compatibility, and security of your Mac, and is recommended for all users....
The macOS Sierra Trust Store contains trusted root certificates preinstalled with macOS .
This document describes the security content of macOS Sierra 10.12.6, Security Update 2017-003 El Capitan, and Security Update 2017-003 Yosemite....
This document describes the security content of macOS Sierra 10.12.5, Security Update 2017-002 El Capitan, and Security Update 2017-002 Yosemite....
This document describes the security content of macOS Sierra 10.12.2, Security Update 2016-003 El Capitan, and Security Update 2016-007 Yosemite....
This document describes the security content of macOS Sierra 10.12.4, Security Update 2017-001 El Capitan, and Security Update 2017-001 Yosemite....
The macOS Sierra 10.12.6 update improves the security, stability and compatibility of your Mac, and is recommended for all users....
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