Discussion between Tak and David Anderson

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21:19

A: How can I download an older version of OS X/macOS?

The following steps can be used to create a USB installer for El Capitan. This answer requires the use of a Mac that can actually run El Capitan, otherwise step 3 will fail. Use these instructions to download InstallMacOSX.dmg. Open file InstallMacOSX.dmg. Open file InstallMacOSX.pkg. Inst...

Tak

In step 3 when I Open file InstallMacOSX.pkg it says This version of OS X 10.11 cannot be installed on this computer.

I am running these steps on macOS Catalina on my MacBook

David Anderson

I tested the steps using a High Sierra in VirtualBox. The host is a 2013 iMac running Catalina. Let me know if the answer works with Catalina so I can update the answer.

Tak

In step 3 when I open file InstallMacOSX.pkg it says “This version of OS X 10.11 cannot be installed on this computer”

David Anderson

What is the model/year of the Mac running Catalina? You may not be able to install if the Mac can not actually run El Capitan.

Tak

MacBook Pro 2017 with touchbar

David Anderson

21:19

The original operating system on that model was macOS 10.12.5

Tak

I think there is a confusion here. I have two machines 1 iMac 2009 24” and one MacBook Pro 2017 touchbar. The iMac I cannot open at all as I erased everything from the Macintosh HD and I am trying to fix so I am trying to follow your steps on my MacBook Pro so I can create this bootable USB for the iMac to boot the iMac from. So when I follow these steps on the MacBook Pro I get stuck in step 3 as it says “This version of OS X 10.11 cannot be installed on this computer” so I don’t know what shall I do?

And advice?

David Anderson

I am testing a procedure for creating the USB flash drive installer on your 2017 Mac.

Tak

Okay, thank you, please let me know and tag or mention me so I can get notified :)

I appreciate your help

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