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dont know history..
20v a0.3 then down to a0..see battery charging sign even without battery..
DFU-restore stuck on installation and charging down to 5v
No becouse it just show sing of battry charging and dead..
now i was try Restore again: after few min that is stuck it give the error - "Gave up waiting for device to transition from DFU...(4042)"
i thnk that the mac is freezing or dead when is start the restore..also on charge he drop to 5v 0a