Install Mojave in new volume with Ventura on primary volume.

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Install Mojave in new volume with Ventura on primary volume.

I'm back with new questions. I have a new Mini running Ventura 13.5. I've used Migration Assistant to copy everything from my old Mini, running Catalina. Everything seems to run except Lightroom. So I've created a new volume just to run Lightroom. I need to load Mojave on the new volume but I haven't figured out how to create a bootable usb copy of Mojave. I found instructions to paste this string into Terminal, but that didn't work:

sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

Password:

sudo: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia: command not found

If somebody will point me in the right direction, I would be ever so grateful.

Thanks, David.

Mac mini, macOS 10.15

Posted on Aug 30, 2023 2:40 PM

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Answer 1

Aug 30, 2023 11:03 PM in response to dgerety

> I don’t use Lightroom often enough to justify a monthly fee. Adobe has made the program unattractive for hobbyists

For a while my son booted his Intel Mac from Big Sur to the internal disc's Mojave volume to run old Lightroom 6.14. But he got tired for that clumsy workflow and eventually coughed up some $$ and bought the new Ventura-compatible Adobe subscription for it.

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Answer 2

dialabrain

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Aug 30, 2023 2:57 PM in response to dgerety

dgerety wrote:

I'm back with new questions. I have a new Mini running Ventura 13.5.

How new? You can't run Mojave on an Apple silicon Mac.

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Answer 3

dialabrain

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Aug 30, 2023 4:09 PM in response to dgerety

Yes it's Apple silicon. Nothing older than what it shipped with will run, which I assume was Ventura.

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Answer 4

dgerety Author

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Aug 30, 2023 3:27 PM in response to dialabrain

Ten days, more or less. It an M2 Pro. Is that Silicon? If Mojave won’t run on it, will Catalina?

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Answer 5

dgerety Author

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Aug 30, 2023 4:28 PM in response to dialabrain

Yes, Ventura 13.5. Will a partition instead of a Volume allow me to run an older OS?

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Answer 6

dialabrain

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Aug 30, 2023 4:32 PM in response to dgerety

No. As I tried to explain, you cannot run a version of macOS that is older than what a Mac was shipped with.

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Answer 7

dgerety Author

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Aug 30, 2023 4:34 PM in response to dialabrain

You’re explanation was fine. I was hoping that a partition would allow an older OS. I guess I can either keep the old Mini for Lightroom or find another program.

Many thanks for your help.

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