Re-installing OS Sonoma

Re-installing OS Sonoma

I’ve installed it a few months ago with no issues. I had to take my late 2012 21” iMac for repairs and they had to wipe clean so got downgraded to High Sierra. I’m trying to re install it, but it keeps saying permission denied. My SIP is disabled and permission should be to me. Not sure what to do here?

submitted by /u/Important_Flower_969
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