This answer assumes you want the El Capitan USB installer to install El Capitan on an older Mac capable of running Snow Leopard (OS X 10.6). In this case, you can solve the problem by using the older Mac to create the El Capitan USB installer.
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.
- Right Click on your USB drive option in TransMac and select Format Disk for Mac. After that, right-click the USB Drive and select Restore with Disk Image. Point to your Mac OS.dmg or.iso file by clicking the add button. After that TransMac will create bootable Mac OS USB within few minutes.
- Question: Q: Failed attempt to install El Capitan, now cannot restart in previous version. I tried to upgrade to El Capitan from OS X 10.6.8, which I realise is not possible. On restart, Mac keeps trying to install it and now I can't get back into my Mac at all.
- To create bootable USB installer for Mac to Install Mac OS X El Capitan on Windows, on Mac or VirtualBox, you have to create bootable USB flash drive. Let’s get started on how to do it. First, you have to download TransMac software for Windows and install it on your computer.
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
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,
/create-bootable-os-x-el-capitan-installer-2259939-0106fd090b9849678b321c6f4419643b.png "Installer")
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,
Install Os X El Capitan
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..
Download Os X El Capitan Dmg
Mac Os X El Capitan Usb Installer Download
Jan 15, 2020 12:58 AM