To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.

Learn how to upgrade to macOS Big Sur, the latest version of macOS.

15:51 $ systemprofiler SPSoftwareDataType Software: System Software Overview: System Version: OS X 10.11 (15A284) Kernel Version: Darwin 15.0.0 Boot Volume: Macintosh HD Boot Mode: Normal Secure Virtual Memory: Enabled. Firefox version 78 is the last supported Firefox version for Mac users of OS X 10.9 Mavericks, OS X 10.10 Yosemite and OS X 10.11 El Capitan. These users will be moved to the Firefox Extended Support Release (ESR) channel by an application update. This will provide security updates until the next ESR update in July 2021, after which the. I have OS X El Capitan Version 10.11.6 installed and want to upgrade to macOS Sierra 10.12.6. I have downloaded macOS Sierra version 10.13. I have.dmg file of macOS Sierra 10.12.6 but when I am going install it gives me the following error: I found a lot of.dmg of version 10.12 but I didn't get anywhere then I got version 10.12.1. Oct 01, 2015 This entry was posted in Troubleshooting and tagged 10.11, El Capitan, OS X, OS X 10.11 on October 1, 2015 by Topher Kessler. Post navigation ← Reasons to both install and avoid OS X 10.11 El Capitan Fix package managers not working after installing El Capitan →. The OS X El Capitan v10.11.2 Update is recommended for all OS X El Capitan users. The OS X El Capitan v10.11.2 update improves the stability, compatibility, and security of your Mac, and is recommended for all users.

Check compatibility

The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier.

If a macOS can't be used on your Mac, the App Store or installer will let you know. For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS. To confirm compatibility before downloading, check the minimum hardware requirements:

Os X 10.11.4

  • macOS Catalina 10.15 hardware requirements
  • macOS Mojave 10.14 hardware requirements
  • macOS High Sierra 10.13 hardware requirements
  • macOS Sierra 10.12 hardware requirements
  • OS X El Capitan 10.11 hardware requirements
  • OS X Yosemite 10.10 hardware requirements

Download macOS using Safari on your Mac

Os X Yosemite

Safari uses these links to find the old installers in the App Store. After downloading from the App Store, the installer opens automatically.

This Copy Of Install Os X El Capitan Cannot Be Verified

This Version Of Os X 10.11 Cannot Be Installed
  • macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
  • macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
  • macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion

Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.

This Version Of Os X 10.11 Cannot Be Installed On This Computer

  • macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
  • OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
  • OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard