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Loading Snow Leopard OS 1.6 to Second Partition of Newer Mac

On a 2017 iMac I split the hard drive into two partitions. High Sierra OS 10.13 is loaded on the first partition, and I would like to load Snow Leopard OS 10.6 to the second partition. So I inserted a USB flash drive that has a bootable copy of Snow Leopard. I tested it on an older machine to be sure that it works.

I then opened Disk Utility, which recognized the USB drive as bootable. So I changed the startup disk to the USB drive.

But when I reboot, the Mac stalls at the grey loading screen with the Apple. It refuses to start from the USB drive.

How can I get Snow Leopard OS 10.6 installed on the second partition?

iMac Pro

Posted on Apr 3, 2022 12:57 PM

Best reply

tjk

Level 9

51,116 points

Posted on Apr 3, 2022 1:14 PM

Hi,

Macs cannot run on an OS that is older than the one they shipped with. Thus, the 2017 iMac is too new to run Snow Leopard.

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Loading Snow Leopard OS 1.6 to Second Partition of Newer Mac

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