This happened to me last weekend. I have a 2013 iMac that was running Ventura with the Opencore patch. It came up with an update, Opencore got confused (or maybe I did?), and when I rebooted like an idiot it was bricked.
Needed a new OS installed. Couldn't revert to Ventura, it won't let you downgrade. Also, it wouldn't even let me reinstall the same point release. Ended up having to install Sonoma (or wait who knows how long for a newer point release of Ventura... weeks, months?).
Similar setup here (albeit Monterey on a 2013 from an external SSD) - under Software Updates it says Sonoma is available, although presumably this would fail if I went ahead
I'm guessing updating via OpenCore would work, but switching from the unofficial to the official way makes it go haywire?
In the past I made a partition and loaded the newer OS onto that, in the hope that if it failed or ran badly I could just boot from the old working one
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This happened to me last weekend. I have a 2013 iMac that was running Ventura with the Opencore patch. It came up with an update, Opencore got confused (or maybe I did?), and when I rebooted like an idiot it was bricked.
Perma-bricked bricked, or “needs a new OS installed” bricked?
Needed a new OS installed. Couldn't revert to Ventura, it won't let you downgrade. Also, it wouldn't even let me reinstall the same point release. Ended up having to install Sonoma (or wait who knows how long for a newer point release of Ventura... weeks, months?).
Similar setup here (albeit Monterey on a 2013 from an external SSD) - under Software Updates it says Sonoma is available, although presumably this would fail if I went ahead
I'm guessing updating via OpenCore would work, but switching from the unofficial to the official way makes it go haywire?
In the past I made a partition and loaded the newer OS onto that, in the hope that if it failed or ran badly I could just boot from the old working one