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https://anadoxin.org/blog/creating-a-bootable-el-capitan-iso-image.html

It's very easy to create a bootable ISO image of El Capitan, if you have aworking El Capitan system installed on your machine.

To make an iso file capable of installing el capitan into vmware fusion. To make an iso file which can be burnt onto a dvd such that you could boot up the el capitan installer from the dvd and install el capitan. THEY ARE 2 DIFFERENT ISSUES. Bootable USB Stick - macOS X El Capitan 10.11 - Full OS Install, Reinstall, Recovery and Upgrade. Sold by Tech-Shop-pro and ships from. Download El Capitan ISO is developed for Mac OS users. This provides smoother and faster features to your Mac OS. If you are in need to download this amazing El Capitan iso you are in the right place. Mac OS X El Capitan ISO: Overview. The ISO Files for a software system are those that can be burned into a bootable DVD and then they can use the DVD to install the particular Software or Operating system on ones PC/Mac/MacBook.

Start with going to AppStore and installing El Capitan, so you'll have anapplication named Install El Capitan in your Application list. Then, youshould follow the steps below.

There is an installation image file inside /Applications/Install El Capitan.app, named InstallESD.dmg. It's not a bootable ISO that can be usedto install the system on a virtual machine, but we'll get there. Mount thisimage to some directory by using the hdiutil tool:

The -noverify and -nobrowse options are there to make mounting operationfaster and to make sure that Finder will not automatically pop up.

Now let's create a placeholder image of our ISO file.

This can take a while.

After an empty ISO file will be created, we need to mount it:

Then, we will use asr tool to populate the contents of our new drive:

The asr tool will automatically create a new mountpoint, /Volumes/OS X Base System. We're going to put some files into this directory.

First of all, remove an invalid link that won't be needed here:

Instead of this link, we need a proper directory, full of package files. We'regoing to copy this directory from the ESD image that we have mounted few stepsearlier.

Convert Downloaded El Capitan.app To Bootable Iso

We're going to copy some additional installer dependencies as well.

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After that, we can unmount stuff we don't need anymore:

Last step is to convert our ISO file into the UDTO format.