About Mac OS Mavericks 10.9. Apple OS X Mavericks was first announced in June 2013 and was then released in October of 2013. It was the tenth big release of the Apple OS X line. At the same time, Mavericks was promoted and marketed as a major release just as was the case with the Lion and Mountain Lion OS X updates which came before the Mavericks.
If you're using OS X El Capitan v10.11.5 or later and your App Store preferences or Software Update preferences are set to download new updates when available, macOS Big Sur will download conveniently in the background, making it even easier to upgrade. A notification will inform you when macOS Big Sur is ready to be installed. Click Install to.

Step 1 How to create a bootable USB drive. If you're currently running macOS Mojave, click this link to find the Mojave installer in the App Store. For Catalina, click here. For all earlier versions of macOS, launch the App Store on your Mac, and search for the macOS version you want (this option is only available when running macOS High Sierra. OS X El Capitan Installer. Download andyroid for macbook. 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. OS X El Capitan (10.11) MacRumors attracts a broad audience of both consumers and professionals interested in the latest technologies and products. We also boast an active community focused on purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.

OS X Mountain Lion (version 10.8) is the ninth major release of macOS, Apple Inc.' S desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012 for purchase and download through Apple's Mac App Store, as part of a switch to releasing OS X versions online and every year, rather than every two years or so.

To complete the clean install procedure described below, you'll need an 8GB or larger USB thumb drive and an hour or two to spare. You should also perform a full backup of your Mac beforehand.
Download and keep a copy of the ‘Install OS X El Capitan’ App. (Download from App store but make a copy of it before you install it as the Apple Installer deletes it after you use it.) Put it in your ‘Applications’ folder. Format your blank USB (8GB is a good size) as Apple OS X.

Mac operating system’s twelfth major version is the El Capitan Installer (version 10.11). All the Mac computers which don’t have the privilege to upgrade to MacOS High Sierra or the computers that need to upgrade to El Capitan first, can download this twelfth version on the computer. This is the very last version of the Mac operating system which comes under the name OS X. And it is named as ‘El Capitan’ after the formation of a rock in the Yosemite National Park. El Capitan Installer is the post version to the Yosemite, and it was built by adding up more improvements to the Yosemite. In this version of the Mac operating system, the Apple Inc. has focused on the performance, stability, and security of the computer. Anyone who is interested can download it on the Mac PC.

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How to download El Capitan Installer?

If you want to upgrade to OS X El Capitan, first you have to collect gather your Mac PC and then download the El Capitan Installer. That’s what we are going to do now.

Go to the App Store and open the El Capitan page there.
Then you must click on the ‘Download; button on the El Capitan Page.
If your Mac PC is compatible to perform this upgrade, a file named ‘Install OS X El Capitan’ will download to your Applications folder.
The installer will open automatically after finishing the download process. All you have to do next is click on the ‘Continue’ button and follow the onscreen instructions.

Upgrade Mac OS Version with El Capitan Installer while Protecting your Data

Before executing the Upgrade, you must prepare the Mac PC for the El Capitan Update. For that, gather these requirements first.

The Mac PC must have at least 2GB of memory and 8.8GB of storage space.
The PC must have at least 45% of battery life.
Connect the Mac PC to Wi-Fi or any other internet connection.
The Mac Apps must be up to date with the latest versions.
Take backups of all your personal data and present OS of the Mac PC.

Important! It is very important to backup your important data on the Mac PC to an external storage device because it will help you to avoid the data loss issues. If any case, you forgot to backup the data, your data may be lost while executing the El Capitan Installer update. So make sure you make a backup of the device data.

Clean Install El Capitan Without Usb Driver

How to use El Capitan Installer for a Clean Install?

01. El Capitan Clean Install on Empty Volume with El Capitan Installer

This is the easiest method for the clean install. Here, you can install the OS X El Capitan Installer onto an empty volume, or you can use a storage space that has the content which no longer needed and don’t mind removing. What it matters here is that you don’t use the current startup volume as the destination here. What makes this method easier is the fact that it is possible to perform this clean install while booted from the current startup drive. You don’t need a special, custom-made startup environment for the empty volume clean install. All you have to do is, start up the installer and go.

02. El Capitan Clean Install on Startup Volume with El Capitan Installer

Clean install el capitan without usb drive

This is the most common method of the two. Usually, the clean install process deletes the contents of the destination drive. Therefore, if you choose the startup drive method to perform the clean install of El Capitan Installer, you have to follow some extra steps as well.

First, you have to create a bootable USB flash drive that has the Installer of OS X El Capitan.
Then erase the startup drive.
After then, start the clean install process.

How to Create El Capitan Installer with USB?

Requirements

The USB flash drive must be at least 8GB
El Capitan Installer must be on the Mac PC’s Applications folder.

Process

Plug the USB drive into the Mac PC with the Installer of the El Capitan on it.
Rename the USB driver using an easy to remember and use name. (For the ease of the steps ahead, I will rename it as ‘ElCaptIns’)
Be sure that the Installer of the El Capitan named ‘Install OS X El Capitan.app’ is in its default location (Applications folder).
Select and copy the text of the below-mentioned terminal command.

sudo/Applications/InstallOSXElCapitan.app/Contents/Resources/createinstallmedia --volume /Volumes/ElCaptIns --applicationpath /Applications/Install OS X El Capitan.app

Now you can launch the terminal in the Applications/Utilities/
In this step, it deletes the data in the destination drive. So make sure it doesn’t contain any valuable data and paste the copied command into the terminal, then press ‘Return’.
When the windows prompted, enter the admin level account password of yours and press to Return.
Then a message telling “To continue we need to erase the disk at /Volumes/ElCaptIns. If you wish to continue, type (Y) then press return:” will emerge. You can type ‘Y’ and press to return to continue. You are already set if you don’t see this message.

USB installer and El Capitan Installer in Apple Store

El Capitan Installer