Instructions for installing macOS 15 guest don't work

J

johnrellis

Member
I tried to install a Mac OS 15.0 guest (release, not beta) on a Mac OS 14.6.1 host (Apple M2 Max, Parallels Desktop Pro 20.0.1), following these instructions, but they don't work:
Install macOS virtual machine on a Mac with Apple silicon

I downloaded "UniversalMac_15.0_24A335_Restore.ipsw" from here:
https://developer.apple.com/download/

Following the instructions in the article, I opened that .ipsw in Parallels Desktop. It created a virtual machine in Desktop, but when I tried to run it I got:
upload_2024-9-24_15-1-49.png

Clicking Install produces this error:
upload_2024-9-24_15-2-29.png

Restarting the host Mac didn't help.

I was able to install a Mac OS 15 guest by doing Parallels Desktop > New > Download Macos, which installed Mac OS 14.6.1, and then doing a Software Update in the 14.6.1 guest. But I had been hoping to avoid the extra download and install of Mac OS.
 

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I wonder if I was tripping over this bug that was fixed in 20.1.0:

"Fixes the issue that resulted in ISO installation images built for Arm architecture erroneously designated as incompatible during the VM setup process;"​
 
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