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Updated version of the 2016 Retina MacBook. Model A1534, EMC 3099. Now features faster Kaby Lake processors up to 1.4 GHz Core i7 with Turbo Boost up to 3.6 GHz and up to 50 percent faster SSD, and supports up to twice the memory.

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bricked MacBook after upgrade to Big Sur OS

Bricked macbook retina I7 2017 after upgrade to Big Sur OS. Which part do I replace? Is this fixable?

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You’ll need to speak with Apple to log the issue and for them to fix your system.

Sadly, there isn’t any part to fix this that you can replace here.

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i was able to revive mine (a different one - mid 2014 mbp with retina) by disconnecting the io board with hdmi, sd card slot, usb and wifi. apparently the reason is a conflict between firmware (?) and that card (possible cause in my view is inability to initialize all the bootable devices - sd card and usb are among those). ill try to downgrade firmware - should get that board functioning again…

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@arty_333 - Sadly the MacBooks don't have a separate I/O board like the Pro models. Thats why he will need to talk with Apple directly for an answer.

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@danj that sucks... i would have never opened (and never knew what’s nside) mine if not for big sur ((

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arie137 will be eternally grateful.
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