Sep 30, 2015 El Capitan 10.11.6 is now released as the latest version of Download El Capitan. For OS X El Capitan users this update is recommended. The upgrade to OS X El Capitan v10.11.6 enhances your Mac's reliability, performance and protection and is advised for all users. Solves a problem that can prevent parental control accounts from saving settings. Mac OS X El Capitan 10.11 ISO / DMG Files Direct Download Mac OS X El Capitan: Being the 12th major release of macOS, Mac OS X El Capitan belongs to the Macintosh-Unix family of OS. It was majorly released for server OS for Macintosh computers and Apple Inc.’s desktop.
You bought a CD, madness.
If you want to upgrade your Mac from Yosemite to another newer OS you have three alternatives..
El Capitan, Sierra and High Sierra are all available for download and are free.
It sounds like you have been trying to install updates to El Capitan downloaded from the Apple Support Downloads pages. If so you need to have already installed El Capitan, that is why you are getting the message about 10.11.
for example if you downloaded the 10.11.6 Combo update this will update any previous version of El Capitan from 10.11.0 to 10.11.5 to the last version 10.11.6. Please remember full versions of OS's are only available via the Mac App Store.
Os X 10.11.0 Download
Depending on the age of your Mac you may not be able to upgrade to Sierra or High Sierra, if so you should be able to upgrade to El Capitan.
Have a look at the links below to determine what OS you would like to download. Bear in mind though that if your Mac qualifies for High Sierra then you will be denied the download of El Capitan.
The versions that will be downloaded in each case will be the latest versions of each OS, so for El Capitan it will be 10.11.6, Sierra will be 10.12.6 and High Sierra will be 10.13.3.
If you tried Erics link to El Capitan and you couldn't download it, then the App Store is recognising that you Mac qualifies for High Sierra, so you can upgrade to that or if you want you could also upgrade to Sierra from the link above.
Feb 28, 2018 12:24 AM
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 affected users will no longer receive security updates.
While Apple does not have a public policy governing security updates for older OS X releases, their ongoing practice has been to support the most recent three releases. The last security update applicable to OS X 10.11 was made available in July 2018. Unsupported operating systems do not receive security updates, have known exploits and can be dangerous to use, which makes it difficult to maintain Firefox on those versions.
Up until July 2021, we will be updating affected users with critical security updates through the Firefox ESR channel to help retain the best possible security. After this, no security updates will be provided.
Download Mac Os 10.11 Installer
If you want to keep your Firefox version up to date, you will need to upgrade your operating system to macOS 10.12 or higher. Older versions that are not supported by Apple are unreliable and unsafe to use, which also makes it difficult to maintain Firefox on those versions.
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