To Update need to connect to recovery mode and install os online by wifi .T2 chip not accept restore by apple configurator only serie M1 and M2
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this is understandable! just explain how to get out of the dfu if it's stuck in it? To start Internet recovery you need to correctly complete the DFU mode!Originally posted by bilel View Post
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I haven't reached the activation window yet, it doesn't work with the DFU!Originally posted by mon2 View Post
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From post # 4, we know that PPBUS_G3H created by U7000 is not yet boosted to the ~13 volts by the SMC.
Measure the voltage to ground of the following points of interest:
I2C_PWR_SDA
I2C_PWR_SCLComment
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You replace t2 chip ! was have serial number !Comment
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I swapped the BIOS chip with the serial number from another MacBook, same problemOriginally posted by bilel View PostComment
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Post #25Comment
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I've just swapped T2 from one a1989 (that was not working - burned display pin in cpu). To another a1989 that was icloud locked. Nothing else just T2
First thing you have to do is boot to DFU and connect to another macbook with Apple configurator 2. Device must be shown as apple device (under DFU in apple configurator, if it shows DFU but under is Unknown device that is probably because T2 is bad or bad soldered)
second Revive (that can end with error - but you need to have apple logo at least on the macbook)
third when it finished (at least for me it was so) macbook started in DFU and i go to Restore via apple configurator (whole process until padlock)
then macbook started that no OS installed (flashing folder icon). I've restarted it in internet recovery (CMD + Option + R) reinstalled os and it's working.
everything except fingerprint (i have to find correct fingerprint that was married with that T2)Comment
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