2010 MP stuck in update

I have a 2010 MP that's been running OCLP for a few year. Yesterday it tried ti install a Tahoe update and got stuck. I know it can take hours so I left it running all night. Now 10 hours later it's still at that same spot.

I tried to restart in safe mode but holding the shift key isn't working. I've tried holding the shift key after the chime, before the chime but it just keeps cycling.

Any ideas before I am forced to wipe SSD and start from scratch?

submitted by /u/Proud_Front8837
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