Apr 26, 2021 Use Terminal to Create the El Capitan Bootable USB Installer. Follow these steps to create a bootable USB installer of El Capitan in Terminal. Connect the USB flash drive to your Mac. Give the flash drive an appropriate name. You can do this by double-clicking the device's name on the desktop and then typing a new name. Make a NEW BLANK DISK IMAGE: CD master, 7316Mb, Apple Partition Map and use the new mount as destination drive (I named it 'Bootable El Capitan'). Note the custom size is as small as you can go and fit it all in. Apple Partition Map otherwise will become GUID and be unbootable (yep!), and CD master to give us a cdr file which we will rename to iso. No criticism, it took me a few tries to create a 'bootable' disk for El Capitan. Anyways, once you have preserved your data, you can try Disk Utility to see if it can fix the problem. If/when it does not it may just be faster to wipe the disk, format it, load El Capitan, then transfer over your data, but that is a royal pain I know. Download the El Capitan installer from the App Store and then select El Capitan in Diskmaker X. We'll use a flash drive but you can use pretty much anything with enough free space. I created a USB disk with a bootable El Capitan as per this documentation. Plug-in your USB key on a turned-off computer. Start your Mac, press immediately OPTION (aka ALT) Select the Orange icon (aka a USB stick) labelled El Capitan. If it does not detect it after 10 sec and you only see your hard-drive. Try another USB port and wait 10 sec again.

Download El Capitan

Download El Capitan OS X is also significant since it’s the last version of Apple Mac OS X released as its successor Sierra was released in the year 2016 under the brand macOS.

El Capitan latest version

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. El Capitan Download latest version solves an issue, which prevents access to SMB sharing points by some network devices, such as speakers and multifunction printers. It improves startup time for the NetBoot server connection. Solves a problem that can make authentication of Active Directory longer than anticipated.

At the time of release, El Capitan was promoted as a significant release by Apple similar to how they promoted Mavericks and Yosemite upgrades which were the predecessors of El Capitan.

OS X 10.11 El Capitán

This update is recommended for all OS X El Capitan users.

The OS X El Capitan v10.11.6 update improves the stability, compatibility and security of your Mac and is recommended for all users.

This update:

Fixes an issue that prevents parental controls from saving settings in enabled accounts.
Fixes an issue that prevents some network devices, such as speakers and multifunction printers, from accessing SMB partitions.

Enterprise Content:

Improves boot time when connected to a NetBoot server.
Fixes an issue with a netboot image created with OS X v10.11.4 or OS X v10.11.5 installer preventing it from booting.
Active directory authentication fixes an issue that may take longer than expected.

System and Hardware Requirements for Download El Capitan

System requirements : You should have OS X v10.6.8 or below version and 2GB memory. And should have 8.8 GB of capacity. Apple ID is required for certain features; terms are applicable. Certain features include an Internet service provider that is compatible; fees can apply.
Hardware requirements : MacBook (early 2015)/ MacBook (late 2008 Aluminum or early 2009 or newer)/ MacBook Pro (Mid or late 2007 or newer)/ MacBook Air (late 2008 or newer)/ Mac mini (early 2009 or newer)/ iMac (mid 2007 or newer)/ Mac Pro (early 2008 or newer)/ Xserve (early 2009).

Features of OS X 10.11 Download

Safari has new features in the El Capitan update. It allows you to easily pin the tabs in the browser to the tab bar so that you can easily access them in the next time
It has multi-touch gestures to applications like Mail and Messages. And it uses the gathered information of the individual emails on the apps like Calendar
The Maps feature in the OS X 10.11 offers you the information about public transportation
Notes feature has added more powerful text processing capabilities. Under this improvement, you can add to-do-lists just like the Reminders application, map locations, photos and videos, inline webpage previews, digital sketches, and other media types
The Spotlight feature is more improved with more contextual information
The Photos feature in the El Capitan can now use editing tools from other apps
The System Integrity Protection gives you more protection to the OS X El Capitan running Mac computers and laptops

To create a bootable El Capitan installer drive, you need the El Capitan installer from the Mac App Store and a Mac-formatted drive that’s big enough to hold the installer and all its data.
Select OS X El Capitan installer on the USB flash drive and then press Return to start up the Mac from the installer. Before you can clean install OS X El Capitan, you must first erase the current startup drive that holds the older version of OS X. Select Disk Utility and Continue.
Remember, Time Machine doesn't produce backups you can boot from. You would need to have used an app that can create clones, such as Carbon Copy Cloner, SuperDuper, the Disk Utility Restore function (OS X Yosemite and earlier), or use Disk Utility to clone a Mac's drive (OS X El Capitan and later).

These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

Every time I’ve tried to create the bootable installer, Terminal gives me the same answer: To use this tool, you must download the macOS installer application on a Mac with 10.12.5 or later, or El Capitan 10.11.6. Remember, this method is not the same as a clean install, and it only reinstalls the version of OS X that is currently running on the Mac (shown here with El Capitan), whereas Internet Recovery will reinstall the version of OS X that shipped with the Mac (in this case it would have been Yosemite) instead. Obviously the versions of OS X will.

What you need to create a bootable installer

A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14GB of available storage
A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan

Download macOS

Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra
These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
Download: OS X El Capitan
This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

Connect the USB flash drive or other volume that you're using for the bootable installer.
Open Terminal, which is in the Utilities folder of your Applications folder.
Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different na

El Capitan Boot Disk