I have an iMac 2011 that got problems with a patch and now I can only enter Sonoma by recovery mode, without no gpu acceleration. Can't pass through the logo in normal mode. Blank screen after 60% of loading.
I'm trying to reinstall a previous suported Mac OSx, but it can't boot, same problem as the regular login and it don't start internet recovery.
So I tested in the hardware diagnostic mode and got this error
4SNS/1 /40000000: TH00-9.000
Any ideas?
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