I have a 2008 Mac Pro (3,1). Dual 2.8Ghz quadcores, 64GB RAM, and a 2 TB internal SSD. I was running El Capitan and opted to put in @dosdude1 's High Sierra patch in order to be able to run some newer software I couldn’t run on El Capitan. Following his website's instructions, I ended up installing from a 32GB USB thumb drive. Dosdude1 Patcher El Capitan Oct 05, 2019 Let's say I want to install Catalina on an old iMac 7,1 (with SSE 4.1 support) to which dosdude1's APFS ROM Patcher has been previously applied. The iMac is currently running El Capitan, but I want to completely erase its disk and reformat it as APFS; El Capitan Patcher Tool For Unsupported S Mac OS X The. Sites To Find Free eBooks. Ebookee – Books you will find: Almost any book, magazine, even audio books you can imagine. Not all links work, but fresh. We have another one for you. Download the macOS X El Capitan ISO file and don’t let it run automatically. Make a copy of the El Capitan ISO (10.11) on a disk or flash drive. Make sure the drive has enough capacity. The driver will require over 5 GB of empty space. (You can also use Dishmaker for this process). Testing the El Capitan installer which has a published URL it will appear in the App Store, but if requested to download no longer says 'not valid for this Mac' it now says 'The requested version of macOS is not available'. Can't install OSX el capitan, stuck on installation screen Hello!

Dosdude Sierra

This article is about macOS High Sierra – but the newer versions are working the same way.

There is a way to install newer versions of macOS on older unsupported Macs. The tool is called „macOS High Sierra Patcher“ and can be found on this website with instructions:

Personally, I did it on my Mac Pro ’08 (MacPro3,1), which officially supports only OS X 10.11 „El Capitan“. With the „macOS High Sierra Patcher“ I managed to install the latest macOS (10.13). Now I have Siri and many other new features on this computer. The usage is still very good.

Question :

I read somewhere that it is possible to install the latest version of OSX 10.10 Yosemite on my Mac, even though the official installer refuses to install.

Can you give me any directions ?

Answer :

Installing newer versions of OSX on slightly older Macs that do not meet the official system requirements can be done using MacPostFactor (MCPF).

MacPostFactor also supports installing OSX versions up to OSX 10.10 Yosemite on older Macs. And a new version that supports installing OSX 10.11 El_Capitan is in the works.

For more info (and downloads), go to the info page on MacRumors.com :

or see the (less readable) official page of the MacPostFactor team :

…in short :

!!! THIS IS FOR (RATHER) EXPERIENCED MAC-USERS ONLY, AND SHOULD NOT BE DONE ON YOUR ‘ONE AND ONLY’ MAC !!!

!! REMEMBER : DO FOLLOW THE COMPLETE INSTRUCTIONS THAT CAN BE FOUND HERE : MacPost Factor info page on MacRumors.com

…that should be it !

enjoy !

Dosdude El Capitan Patcher

😉