Do not try to install the version of El Capitan downloaded from the App Store Purchased page

it probably has outdated certificates.

I copied the CodeSignature folder from inside Install OS X Mountain Lion.app to the same position inside Install OS X El Capitan.app on the Flash drive. 4) Restart the Mac with option (alt) key pressed and you will be presented with bootable volumes. Select your Flash Drive using the keyboard arrow keys and press enter. Give it 5 mins to boot up.

• Only option in the recovery is to install El Capitan. Open the App Store and click the download link for High Sierra. If you purchased the computer from someone else who installed El Capitan using their Apple ID you cannot reinstall it, you must sign into the Mac App Store using your ID and download the latest Mac OS that is available for your.
• OS X El Capitan Installer. Official OS X El Capitan Installer from the Mac App Store. Un-archive the zip archive and you will get the app Installer. A bootable ISO or bootable USB can be made from this installer. Instructions on how to do that are on the Internet/Youtube.
• Feb 24, 2021 This is the Install DMG of OS X El Capitan, downloaded from Apple's website just before this upload. This is for archiving purposes, just in case Apple decides to remove the download, so people can still download this in the future. 2021-02-24 22:39:21. Internet Archive HTML5 Uploader 1.6.4.

There is no need for you to install all the OS X's to get to El Capitan you can install directly from

Mac OS X Snow Leopard 10.6.8. After you have installed Snow Leopard you need to update it to

version 10.6.8 from here,

And if the installation fails you should not have to erase the mac and reinstall Snow Leopard.

If you do have an operating system on your mac and it is functioning then you can download

El Capitan using this method.

Open your Safari browser and click on the link below,

Go to Download OS and click on OS X El Capitan 10.11

this downloads InstallMacOSX.dmg to your Downloads folder.

The next section can only be done on a mac that is capable of running El Capitan.

This includes macs that have the potential to run El Capitan but have been upgraded to a newer OS.

A mac that came preinstalled with an OS later than El Capitan will refuse to do the next bit.

When downloaded open to InstallMacOSX.pkg, double-click on

that and an installation window will open, this does not install El Capitan

but converts the InstallMacOSX.pkg to the Install OS X El Capitan.app which

you will find in your Applications folder, it should be 6.2GBs in size.

(If the installation window asks which disk you want to install to, you must pick

the disk that you are booted to at the time. Not any internal or external disk that

you want to eventually install El Capitan on, that is for later.)

Download El Capitan Ios

To start the installation of El Capitan double click on the Install OS X El Capitan.app.

Install Os X El Capitan Dmg

The copy of the install app self deletes after installing El Capitan, so make sure you keep a copy of the Macos high sierra unsupported mac.

InstallMacOSX.dmg if you need it in future, or you could just make a copy of the Install OS X El Capitan.app

prior to installing and moving it to an external drive for safe keeping.

Install Os X El Capitan This Item Is Temporarily Unavailable

It is also possible to create a bootable USB installer disk using the Install OS X El Capitan.app in the Applications

folder and the createinstallmedia command in the Terminal app.

Read the instructions here,

Sep 26, 2021 12:58 AM