So I have this 2006 Mac Pro 1,1 that I’ve had laying around and I wanted to put my old Nvidia 1030 into it, along with Windows 10 for a newer (stronger?) home machine.

3 thoughts on “ fixed: install OSX 10.11 ElCapitan on unsupported Macs ” TopHatProductions115 on at 17:55 said: Sounds like a plan – I’ll see if I can get my black Macbook 4,1 to run in style! How to install Mac OS X El Capitan on a Macpr. Jan 01, 2007 I use my MacBook Pro with El Capitan as the boot drive and use the MAC Pro G5 as a storage device - the Mac Pro still boots to Lion but it is controlled by my MacBook Pro. The method I used was via an Ethernet '7' connection. One good thing about doing this is if I want to use a 'retro' version of an application. I still can on the Mac Pro. OS X El Capitan on Unsupported Macs. MacOS Extractor, OS X Patcher, and MacPostFactor are apps that guide you through patching and installing OS X El Capitan (10.11), Yosemite (10.10), Mavericks(10.9), or Mountain Lion (10.8) on your older Mac. Another alternative install on a 2006/2007 Mac Pro is to use a second El Capitan-supported Mac and install El Capitan to the 2006/2007 Mac Pro's drive. This may be done either by attaching the 2006/2007 Mac Pro's drive as an external drive by placing the 2006/2007 Mac Pro in target disk mode or otherwise mounting the 2006/2007 Mac Pro's drive.

So I burnt the downloadable ISO from Microsoft onto a DVD, tried to boot it up and got this:

I got stuck at this “Select CD-ROM Boot Type : ” prompt, which you can’t type anything into. Apparently it’s a common and known issue with 64bit boot code, as the older Intel Apple Mac’s are of course 32bit only. So there is a fix, you have to use something called “oscdimg” to rebuild the ISO with a 32bit friendly loader.

So first I just used 7zip to extract the downloaded ISO, and then create the new 32bit ISO with the following:

Upgrade To El Capitan Apple

oscdimg -n -m -bc:tempWindows10bootetfsboot.com c:tempWindows10 c:tempLegacyBootWindows10dvd.iso

And yes, it boots!

Now what about those special ‘bootcamp’ drivers? Obviously under Windows 10 there is no nice way to get the ones you want. And what about which model/download package to get?

Mac Pro 1.1 El Capitan Installation

Then I found Brigadier!

Installare El Capitan Su Mac Pro 1.1

It’ll probe your hardware type and grab the drivers for you!