820-01598 no restore T2

iClub

Member
The client tried to format and install Catalina and ended up locking the mac, I tried to restore the T2, but it shows the following error "AMRestoreErrorDomain error 9 - Failed to receive a message from the device, might be a connection problem with USB host. (Communication error, possibly USB disconnection).
 

2informaticos

Administrator
Staff member
Did you exactly follow all the steps from the tutorial?
Try another connection cable.
Be sure all AWAKE and SLPS2R voltages remain steady.
 

iClub

Member
maintenance expired.

It could be a defect in the CD3217, as the error is referring to a lack of communication on the USB-C.
 

iClub

Member
This mac I managed to restore and install macOS Mojave, but the client installed Catalina and started showing kernel error. Since then I can't restore anymore.
 
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