17-09-2021

This Version Of Os X 10.11 Cannot Be Installed

I need to upgrade to El Capitan 10.11 from 10.9.5 Mavericks.

  • Download Mac OS EL Capitan 10.11 Latest Version. Mac OS El Capitan is the twelfth major release of Mac OS X, that now named as Mac OS X, the latest version is 10.11 for Apple Inc, desktop. Mac OS X El Capitan is one of the most famous operating systems for Macintosh computers. It is a successor to Mac OS Yosemite and forms on performance,.
  • My Mac OSX version: OS X El Capitan - Version 10.11.6. 5: If that doesn’t work try: brew install npm. Npm install phantom phantomjs -g Solution no. 6: The quickest and easiest way to install stand-alone phantomjs (tested on Mac OSX El Captian) (using brew or macports to install takes too long time since they will install.
  • Install OS X El Capitan App Updated - If you downloaded El Capitan from the App Store prior to today, and you want to have the latest version on your backup installer USB, simply log into the Mac App Store and click Download. The updated 10.11.6 Install OS X El Capitan App can be found in the Applications folder.
This Version Of Os X 10.11 Cannot Be Installed

Sierra is no use to me as some critical software I use is incompatible with it.

Dec 08, 2015 The OS X El Capitan v10.11.2 update improves the stability, compatibility, and security of your Mac, and is recommended for all users. This update: Improves the reliability of Handoff and AirDrop. Fixes an issue that may cause Bluetooth devices to disconnect. Fixes an issue that prevented Mail from deleting messages in an offline Exchange account.

El Capitan is no longer available on the Mac App Store so I have been given a link to the download by an Apple Support agent.

When I try to download the El Capitan installer I get the error message 'This version of os x 10.11 cannot be installed on this computer'.

I have an Early 2009 Mac Pro tower running 10.9.5 which should run El Capitan; indeed Sierra is available to me via Mac App Store. I have plenty of RAM and spare capacity on my boot drive.

I have tried creating a new admin account and installing from there - no luck

I have tried safe mode - no luck

I have tried reinstalling Mavericks in case the Mac App Store was corruput - no luck

I have an SSD in the optical bay for boot up and four spinning hard drives in a software RAID.

I have the following PCIe cards

NVIDIA Geoforce GTX570

Os X Yosemite

Apogee Symphony 64 (audio interface)

Universal Audio UAD-2 Quad (audio processing DSP)

Os X Download

Blackmagic Decklink HD Extreme 3

Any idea what is going on and why I can't download the El Capitan installer?

Many thanks in advance!

Mac Pro, OS X Mavericks (10.9.5)