Hello friends, I may have found the fix you've been looking for *jump to the end for the fix, and keep reading to see my story*
I have a late 2013 MBP 13" Retina. Big Sur completely bricked it, magsafe light would come one, fans would "show signs of life"(per genius bar) and the LCD backlight would activate. Doing all the SMC, PRAM and Command R failed with all attempts by everyone. Here comes the "everyone part"I talked with support via chat, via phone, was escalated to a manager, was setup with a Genius appt and they ended up telling me they could fix it for $470+ US and that "My computer is 7 years old and probably on the way out anyway, and something as an (and I quote) 'as invasive as an OS install' finished it off. I had him repeat that for me. I also heard many times that software cant kill hardware. We know from firmware viruses that is basically half true, + heat can kill hardware. Apple care said they would not override the genius bar store conclusion but we should watch for apple to see if their is a fix coming. I plan on calling the genius bar, and apple care to share the following fix that worked for me.
Turns out your MBP was probably just in a Big Sur induced coma like mine, and everyone thought it was dead...turns out it just needs the right TLC. Ok so hear we go, the fix and process. I would be posting this on that mac right now...but I have to do some password recovery for my apple support email and I'm lazy. Big sur is up and working on my 2013" MBP (i'm on a 2019 now) So I was googling reseting the SMC and PRAM and recovery mode again when I stumbled upon this gem about getting into the bios.
The Problem, Big Sur buggered your MBP bios.
However your milage may very as I attempted everything in the book before this. I will list them below in case you want to repeat my entire process.
First I drained the battery, cuz someone had some luck with that, I plugged in power and accidentally unplugged and the out of power light showed on the screen. HA it has battery awareness life!
Attempt to reset SMC half a dozen times, then end up holding option shift (maybe control too) and power and watch the machine quickly turn off once hitting power (this gave me hope). I kept trying Command R every time on the restart but no joy. Then I saw the following below some of the google reset results (and this fixed it)
"How do I flash my MacBook pro bios?"
To access your MacBook's Open Firmware, you must first shut off your computer. Then turn it back on, holding down the “Command,” “Option,” “0” and “F” keys simultaneously as the machine boots to access the Open Firmware interface.
(plug in to power if you drained the battery, you don't want it to die during this)
- To start with, make sure the machine is off.
- Hold Command + Option + Zero + F at same time then turn on power (ask a friend or like me perhaps stretch your pinky finger or something press power. Remember keep holding these keys for a time.
2a. If you get REALLY lucky like me the The apple logo appears and the process bar start moving.
2b. If not keep trying the above sequences of clearing SMC then trying this. I really think this may bring your vegetable brained mac to life again. Sending you lots of positive vibes and hope for you (Don't despair)
3...Let go (of the keys), leave it to do it's thing with the laptop screen up and put on a show. 10-15 minutes later after what looked like and endless cycle of restarts with the apple logo and status bar at various stages, the login screen with the Big Sur wallpaper showed up.
3a. It walked me through all the accessibility options and here we are.
If this works for you please post and let me know.
If you are in management for apple...I can really use a well paying job right now.