MBP 2015 bricked when upgrading to Sonoma, stuck on boot screen with ~5% loaded. Plz advise

I have a MBP 2015 that I upgrade to Ventura using open core about 8 or so months ago. All was well for a bit.

About a month ago, I was using it and the open core dialog popped up and asked about an update to sonoma, foolishly, i said yes...

Since then, it's essentially bricked..

It now stays on the apple logo screen with about 5% of the white bar filled, and won't go past it.

I've tried every combo of booting and got no where.

any help and suggestions would be so appreciated.

Ty in advance

submitted by /u/AdvancedSuggestion
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