Introduction
This project is a new and updated branch of the Yosemite tree and is targetted at OS X 10.11 El Capitan with SIP support, automatic installer detection and fake board-id injection for unsupported models of the MacPro and MacBook Pro.
You need to use OS X Recovery or a USB drive to re-install El Capitan, which is relatively simple to create. All you need is an 8 GB USB drive and a computer running OS X. Instructions on how to create such an installer are here: How to make a bootable OS X 10.11 El Capitan installer drive. The installation is complete, but the drive isn't bootable yet. Boot from the USB again, this time choosing El Capitan. Turn on the computer 2. Press the hotkey to choose boot device 3. At the Boot Screen, choose your new El Capitan installation. Complete OS X El Capitan setup.
Download
All downloads of boot.efi should be done from this project page. All other sources are unsupported.
Download your copy of the prebuild (32-bit) version of boot.efi for El Capitan (compiled on Microsoft Windows 10 with Microsoft Visual Studio 2015) with a black background and white Apple logo now, and verify the download by entering (either one) in a terminal window:
Or download the one for legacy hardware, with a grey background and logo for your Mac Pro and verify the download by entering (either one) in a terminal window:
Note: If the output is different, then your copy of boot.efi should not be used!
Compilation
Don't want a prebuilt copy of boot.efi then compile the source code yourself, with either Microsoft Visual Studio 2013 or 2015. The latter requires you to update the solution files, but that should be done automatically in the MS Visual Studio IDE.
Note: See also Compiling-Instructions
Thanks To
This project would not have been possible without the help of Peter Holbrook, Mike Boss and a number of other people. Peter did all compiling and Mike ran dozens of test builds that Peter pushed out over at forums.macrumors.com Awesome work guys. Job well done!
Create El Capitan Bootable Usb
I'd also like to thank everyone else whoh helped with testing our nightly builds. Thank you so much!
Help
If you need help with the setup then please visit this macrumor thread. Developers, or people who need help with compiling boot.efi themself, can visit this macrumors developer thread.
Note: I myself don't own any unsupported Apple hardware with a 32-bit EFI implementation, so I can probably do not much for you, but there may be others to help you.
Bugs
Bugs can be reported here
Note: Please provide a clear step by step procedure to reproduce the bug. Thanks.
License
My work is licensed under the Creative Commons Attribution-NonCommercial 3.0 Unported License and as such you must add a link to this license. Even if you only use a download link. Also note the term 'NonCommercial' because I don't want to see my work end up anywhere else but here.
Note: 'Tiamo' released his work under a BSD-3-Clause license
Disclaimer
El Capitan Boots
El Capitan Bootable Installer
Copyright (c) 2014-2016, by Pike R. Alpha – All right reserved.