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Question

Problem creating a bootable install drive for Yosemite

Jul 2, 2017 5:20PM PDT

I am running the latest version of Sierra and I wish to make a bootable Yosemite or El Capitan install drive for my daughter who is running Lion. She doesn't want to upgrade to Sierra because one of her key apps won't run on it.

Firstly, is it possible to create a lower-level OS bootable drive on Sierra 10.12.5?

If it is, I have a further problem. I follow the standard instructions, all of which involve the Terminal command:

sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app

or sometimes that with " --nointeraction" tagged on the end.

In both cases, I get the message, "/Applications/Install OS X El Capitan.app does not appear to be a valid OS installer application.", even though I have previously made a bootable disk from that file.

Is there something else I can do?

michael

Discussion is locked

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Answer
In this case, if articles fail to work, clone that drive.
Jul 2, 2017 5:32PM PDT
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Going back isn't going to help
Jul 2, 2017 5:42PM PDT

... because my daughter's Mac is on Lion and she wants to upgrade to either Yosemite or El Capitan - she wants to go forward Happy

I'm puzzled as to why I was able to make one before but can't now. Is there no other way to make a bootable drive?

Alternatively, is there a way to download a Yosemite installer?

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I worry you don't have this version of Mac OS.
Jul 2, 2017 6:12PM PDT
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Looking good
Jul 2, 2017 7:15PM PDT

Yep - that works. Many thanks for that tip - even if I can't make a bootable installer, I should be able to load one of them on to Bronwyn's Mac.