Make El Capitan Bootable Usb

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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.

Rufus won't make a bootable USB compatible with Mac as it cannot interpret the boot loader (at least not in Mavericks and up). Fat32 can't handle the 5+GB Mavericks image either. Not say you didn't get an older version to work, however, just to keep others from wasting their time.

Make el capitan bootable usb
  • Just click on the setup file and with some click, the installation will finish. After that, Launch TransMac when TransMac is launched you will see the list of Flash drives or local disk. Then Right-click on that flash you want to create bootable USB for Mac OS El Capitan then select Restore with Disk Image. Restore with the Disk image.
  • Create Bootable USB for Mac OSX with TransMac Step #3. A new dialogue box will pop up, click on the three dots then choose your Mac operating system.dmgfile. Choose Mac OSX El Capitan dmg file.

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.

Make El Capitan Bootable Usb

Create bootable linux flash drive

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.

Bootable

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.

How To Make El Capitan Bootable Usb

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.

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

Create Bootable Linux Flash Drive

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

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

Create El Capitan Bootable Usb From Dmg File

Done. The ElCapitan3.iso.cdr can be renamed to ElCapitan.iso, and can beused in virtualization software like VirtualBox 5.

Create El Capitan Bootable Usb On Windows 10

The method described above was found on forums.MacRumors.com(permalink).Thanks to colt2!