Make Bootable El Capitan Usb On Catalina

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.

Jun 6, 2019 - 14 Comments. Advanced Mac users can make a bootable macOS Catalina beta installer drive using a USB flash drive. This offers a simple way to install the macOS 10.15 beta release onto a test Mac, either on a separate drive or partition. Using a boot installer drive allows for easy formatting and partitioning of disks too, making.

  • Make sure the copy of “Install OS X El Capitan” is there on /Applications folder. Bootable USB Installers for OS X Mavericks, Yosemite, El Capitan, and Sierra First, review this introductory article: Create a bootable installer for macOS. Second, see this How To outline for creating a bootable El Capitan installer.
  • My Patreon Link: USB installers for older versions of Mac OS X can be tricky, so I decided to put together a more deta.
  • 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.


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 On Catalina

Drag InstallMacOSX.pkg to the Desktop.

Capitan


Open Terminal, enter the text



Bootable


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,


Catalina


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.

Make Bootable El Capitan Usb On Catalina Download


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



El capitan usb installer

Bootable Usb Drive Creator Tool

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..


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