Apple El Capitan Bootable Usb

There is no downgrade, it has to be a clean install on either your current HD or another drive or another partition. You will also either need:

• to currently own El Capitan AND have it in your possession in some way, shape or form.

Cara Membuat Bootable Install USB Drive Mac OS X Macintosh Oleh Admin Update terbaru Apple untuk Mac OS X 1011 El Capitan saat ini tersedia di Mac App.
USB Flash Drive 8Gb Get one on Amazon here: (For El Capitan need a 16GB USB Stick) Mac OS Installer retail Version of Yosemite, El Capitan or Mac OS Sierra, choose one you desire to make the bootable USB.
Setting up lots of Macs? Want an offline installer? Here's how to roll your own.

• your computer shipped with it when purchased and it would be available from Apple using Recovery.

I was having this too. I finally had success by copying the install app/folder from /Applications to the desktop. Once there the 'mount of outer dmg' message was no more, despite using the same command (other than the appropriate path changes). El Capitan Bootable Installer (El Capitan DMG) Now that you have the El Capitan “.app” file, you can use it to update OS X on multiple Macs. If you’re looking for a fresh installation, you need to create the bootable installer for El Capitan. One way to do so is from the El Capitan DMG (InstallESD.dmg) file.

• A computer that was eligible for El Capitan but not any OS X variants after El Capitan.

if your computer was eligible for Sierra and you did not download El Capitan you may no longer be able to get it from the Apple Store as an option. In this event only Sierra and High Sierra would be downloadable unless you have another Apple Computer that is eligible to upgrade to El Capitan and currently has an OS installed that predates it and is not eligible for Sierra, in which case El Capitan should be available to you from the Ap Store

Before you proceed first backup

then create a bootable instance of El Capitan

Either with directions from Apple

or use a 3rd party solution

then format the drive from Disk Utility in Recovery mode

then install the USB bootable devices image to a new partition
(or you will need to reformat your current drive if it's your only option for an install.)

then use Migration Assistant to restore you account and 3rd party applications to your system.

Sep 25, 2017 12:39 PM

Introduction

Apple officially released OS X 10.11 El Capitan operating system in September 2015 as an update through Apple App Store. This actualization will update core of your system and preserve your user data.

However, if you want to have a clean installation of El Capitan on your Mac you will need to create a special installation USB drive and in this article we will show you how.

Four ways how to create El Capitan USB installation flash drive:

Preparation - get OS X El Capitan installer and USB flash drive

Download El Capitan installer (Install OS X El Capitan.app in Applications folder) available in Mac App Store.

Prepare a flash drive with OS X Disk Utility. Format it with GUID Partition Table and name it as Untitled. The minimal capacity of flash drive must be 8 GB.

How to create El Capitan installation USB drive with createinstallmedia tool

The createinstallmedia is a command line tool distributed with OS X installer.

When you have prepared your USB flash drive and El Capitan installer is downloaded from App Store ► open Terminal and type command:

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

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In our case 'Untitled' is the name of USB flash drive! Replace 'Untilled' by name of your flash drive.
Wait a few minutes and your El Capitan installation USB drive will be prepared.

To install OS X El Capitan ► restart computer ► hold the Option key and select Installation USB drive from the menu.

How to create El Capitan USB installation with Terminal commands

When your USB flash drive is ready and El Capitan installer downloaded from App Store ► Open Terminal and type the following sequence of commands:

sudo hdiutil attach /Applications/Install OS X El Capitan.app/Contents/SharedSupport/InstallESD.dmg

sudo asr restore -source /Volumes/OS X Install ESD/BaseSystem.dmg -target /Volumes/Untitled -erase -format HFS+

sudo rm /Volumes/OS X Base System/System/Installation/Packages

sudo cp -a /Volumes/OS X Install ESD/Packages /Volumes/OS X Base System/System/Installation/Packages

sudo cp -a /Volumes/OS X Install ESD/BaseSystem.chunklist /Volumes/OS X Base System

sudo cp -a /Volumes/OS X Install ESD/BaseSystem.dmg /Volumes/OS X Base System

hdiutil detach /Volumes/OS X Install ESD

Now wait until your bootable installation flash drive with OS X 10.11 El Capitan is made.

To install OS X El Capitan ► restart computer ► hold the Option key and select Installation USB drive from the menu.

How to create El Capitan USB installation with Disk Utility and Finder

When your USB flash drive is ready and El Capitan installer downloaded from App Store ► Open Terminal and type:

defaults write com.apple.finder AppleShowAllFiles 1 && killall Finder

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This command allows you to view hidden files in Finder.

Now Open Finder ► Applications ► Install OS X El Capitan.app ► right click ► Select Show Package Contents option.

Navigate to Contents/SharedSupport ► Mount InstallESD.dmg file

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Open OS X Install ESD archive in Finder and mount BaseSystem.dmg archive

Connect USB drive and open Disk Utility (/Applications/Utilities)

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Select the USB drive from the list of disks, select Restore tab and pick Select OS X Base System archive as a source and USB flash drive as the destination. When ready click on Restore button.

After the Restore process is finished, open Finder ► open USB drive (OS X Base System) ► go to the System/Installation folder and select Packages file and delete it.

Open OS X Install ESD volume in Finder, select Packages folder and copy them to System/Installation folder on USB drive.

Also copy BaseSystem.chunklist and BaseSystem.dmg files from InstallESD.dmg volume to root of USB flash drive (OS X Base System).

Now your El Capitan installation USB drive is prepared and ready for use.

To install OS X El Capitan ► restart computer ► hold the Option key and select Installation USB drive from the menu.

How to create El Capitan USB installation disk with DiskMaker X

DiskMaker X tool is Wizard like tool that allows you create OS X installation disk. Download DiskMaker X to your Mac and copy it to Applications folder.

Os X 10.11 El Capitan Bootable Usb

When you have prepared your USB flash drive and El Capitan installer is downloaded from App Store ► open DiskMaker X.

Select version of OS X (in our case El Capitan)

Select copy of OS X installation app

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Select USB drive that will be used for USB installation

And wait a few minutes till the the DiskMaker X finish creating process.

To install OS X El Capitan ► restart computer ► hold the Option key and select Installation USB drive from the menu.