Make Bootable El Capitan Usb

Posted on |

How to prepare a bootable usb disk from 'InstallESD.dmg'? I have High Sierra correctly installed on my Mac. I need to clean install 'el capitan' on a old mac book pro (late 2011). I have 'el capitan' 'InstallESD.dmg' file. How to prepare a bootable usb disk? I've tried the 'restore' function in disk utility, selecting 'InstallESD.dmg' as source. Making The Bootable El Capitan USB Drive We are all here for one thing, so lets dive right in at the deep-end and get started with the process. 1.Wefirst of all need the OS X El Capitan installer that we alluded to as a part of the “ Pre- Requisites” Release the Mac App save and search for El Capitan.

  1. The El Capitan installer file came down to my Applications folder without problem, but multiple repeat attempts to create a bootable USB (16gb) drive using Diskmaker X 5 has failed. The program appears to go through all the steps, but finally the USB drive is never findable as a bootable drive.
  2. Create El Capitan Bootable Usb From Windows Xp It does not matter whether you use macOS or Windows 10. It’s just a matter of time until your device will refuse to start, which could happen for many reasons, including (and not limited to) file corruption, hardware failure, and buggy update.

If you use pkgutil to expand the InstallMacOSX.pkg it opens to three items, the Distribution file, InstallMacOSX.pkg and Resources. You can alter the Distribution file to ignore the supported platform check, see below.


Creating the Install OS X El Capitan.app on a mac that came with a newer OS than El Capitan.


Download the InstallMacOSX.dmg from Section 4 of How To Upgrade To El Capitan

Double-click to open InstallMacOSX.dmg to Install MacOSX.pkg.

Make Bootable El Capitan Usb

Drag InstallMacOSX.pkg to the Desktop.


Open Terminal, enter the text




A folder will be created on the Desktop after a while with the contents of the .pkg file.

In there you will see an item called Distribution, Control-click on that and select Open With

go to Other and select Text Edit.


When the file opens scroll down to the section that reads,



function isSupportedPlatform(){


type in at the end return true; so it now reads as,



function isSupportedPlatform(){return true;


Now click Save and close the document.


Go back to Terminal and enter the text,



press Return, after several minutes, be patient, (check to see if the prompt has returned to Terminal) a new package will be created on the Desktop.


When created double-click on that and an installation window will open where you will now convert the

new InstallElCapitan.pkg to the Install OS X El Capitan.app which will be placed in your Applications folder.


You can now create a bootable USB using the install app and createinstallmedia,



If you have the time I would be grateful if you could give this a trial, it works here on my mac, but I would like confirmation from yourself or any others reading this that the procedure works on macs that came with macOS Sierra or newer pre-installed. Oh and tell me if my description of the procedure is easy to follow and understand..

Bootable



Jan 15, 2020 12:58 AM

If you use pkgutil to expand the InstallMacOSX.pkg it opens to three items, the Distribution file, InstallMacOSX.pkg and Resources. You can alter the Distribution file to ignore the supported platform check, see below.


Creating the Install OS X El Capitan.app on a mac that came with a newer OS than El Capitan.


Download the InstallMacOSX.dmg from Section 4 of How To Upgrade To El Capitan

Double-click to open InstallMacOSX.dmg to Install MacOSX.pkg.

Drag InstallMacOSX.pkg to the Desktop.


Open Terminal, enter the text




Make Bootable El Capitan Usb Windows 7

A folder will be created on the Desktop after a while with the contents of the .pkg file.

In there you will see an item called Distribution, Control-click on that and select Open With

go to Other and select Text Edit.


When the file opens scroll down to the section that reads,



function isSupportedPlatform(){


type in at the end return true; so it now reads as,



function isSupportedPlatform(){return true;


Now click Save and close the document.


Go back to Terminal and enter the text,



press Return, after several minutes, be patient, (check to see if the prompt has returned to Terminal) a new package will be created on the Desktop.


When created double-click on that and an installation window will open where you will now convert the

new InstallElCapitan.pkg to the Install OS X El Capitan.app which will be placed in your Applications folder.


You can now create a bootable USB using the install app and createinstallmedia,


Make Bootable El Capitan Usb On Windows


If you have the time I would be grateful if you could give this a trial, it works here on my mac, but I would like confirmation from yourself or any others reading this that the procedure works on macs that came with macOS Sierra or newer pre-installed. Oh and tell me if my description of the procedure is easy to follow and understand..

Format Bootable Usb Windows 10



Make Bootable El Capitan Flash Drive

Jan 15, 2020 12:58 AM