MacBook Pro wont't boot post update

Too bad the Mac couldn't be convinced to try and boot into Safe mode on one of those startup attempts.

Or if the Mac had been forced to stop everything. Surrender to a new start-up cycle, with force power off;

..then, attempt restart into Safe mode; for further troubleshooting. ~ Maybe it hadn't loaded new macOS?

[Leave it plugged in; least it go into a coma beside this other issue.

Press & hold the power key, 15-20 seconds. Leave the lid open, too.]

I had other more unconventional ideas; reconsidered

all that, and just pressed [Cancel] instead of posting..

Take care & good luck!🌻🤖🐝🌤❄️

There may be a way to start up into Recovery mode and avoid the events which lead to the shut down.

(For Macs that appear to be off, but aren't; there are instructions to make it stop, then try something else.)

• If your Mac doesn't turn on - Apple Support

https://support.apple.com/en-us/HT204267

This relates to ^ an earlier try; with part two.

That, then, suggests visual ability to choose..

from instructions on how to deal with screens

• If your Mac doesn't start up all the way - Apple Support

https://support.apple.com/en-us/HT204156

Maybe your Mac's firmware isn't updated? Not likely, but not unheard of.

In general, an overview; Intel-based macs, same kinda things may appear.

[In M1, 'recovery' is different; like a portal.]

• Ways to start up your Mac - Apple Support

https://support.apple.com/guide/mac-help/ways-to-start-up-your-mac-mh26785/11.0/mac/11.0

Had you attempted to start up with OPT key held, through the boot cycle;

and until you may see icons of partitions or drives? That'd be a good sign.

One of them may be Recovery for the older or newest macOS; by name.

I've used those before to repair a partition, directly. Without other keys.

And older macOS versions too.

Not sure what to suggest; if faced with dilemma such as you, I'd be sure

to have backups to include last one, previous macOS; in a Time Machine.

Good luck & happy trails!🌻

An answer few want to hear or know, the best way forward now is to get

and use newest hardware, that includes a later level of software. ~ As that

gets past the issue where security and other details, match the hardware

design at the software level. This is where an apparent failing occurs now.

The upgrade of now older Macs with newest 'supported' systems, has some

issues; and seemingly will persist until the wave has crested. Not all survivors

know how to swim the torrent or swim to safe harbor; others need new crafts.

Just my opinion; while reading across the web, the stories seem congruent.

Newer security is likely a driving force; & to keep swimming ahead of sharks.

Take care and keep safe!🌞☃️

I'm having the exact same issue after installing Montery on my 2017 Macbook Pro. Will not boot any more, and I tried re-formatting my hard drive and re-installing the OS. I'm going to book an appointment to have the laptop checked out, but I've been working in IT for over 25 years, and I have no idea how the new OS could have completely destroyed this laptop.

He has a 4 year old computer which is fairly new, fresh, and recent. I don't see the reason why he should purchase a new MacBook which costs thousands of dollars.

I faced the same issue. My MacBook 2018 was bricked by the macOS Monterey Update. This is a widespread issue with many Intel-based MacBooks like mine and his (2015, 2016, 2017, 2018, 2019, 2020) as evident by countless threads over the past 2 weeks over this issue.

Apple should offer a viable solution to those affected that includes free repairs and full refunds to those who paid for their repairs. I had to pay Apple $600+ plus and many others too, for them to replace our whole logic boards because they said it was the only option. This is not fair at all. Customers should not be treated as ATM machines. I can barely afford to purchase basic necessities in this economy.

..MontereyVictim:

This type of thing happens, every once in awhile; over

decades of my experience w/ Macs + Apple. At times.

Early adopters used to be more ready to wrestle giants

& do 'viking-like' long marches in bad weather for Macs.

Probably once the 'intel-based' Macs are mostly retired

a newer batch of mac-users lives could be much better.

I've noted how since 1985, every so often, things change.

Had wrestled dozens of dragons & giants here too. In 2003

with arrival by surface UPS, my new iMac G4 finally arrived.

Direct from California. The computer was lost; but papers

for Apple Extended Warranty arrived quickly. So my order

had been sent and received, according to Apple. ~ No Mac?!

Two months later, that was straighted out; the iMac arrived.

Yet its 17-inch display's 'chrome arm' was bent. ~ Took three

months to have an Anchorage AASP order parts, & repair it.

And upgraded the RAM too. But the memory was cheaper PC

RAM, and so there were Kernel Panics. ~ And other disruptive

things. I ended up buying second similar 'build year' iBook G4

to have new enough working Mac; to troubleshoot the iMac.

[Apple at the time, did not accept returns; & had no retail AK store.]

This occurred after a 3-year 600+ Mac 'restore & donation' period

& I learned much about Macs by repairing many dozens of them.

A very disappointing experience after learning so much.. Then be

unable to perform needed repairs on my iMac; under AppleCare.

No AASPs in Anchorage; unwilling/unable to repair or set things right.

Seattle was 'nearest next place' with an actual Apple retail presence.

(And Anchorage, only 3 hrs one-way, away.)

While in recent cases, I've read stories online about 'intel-based' Macs

(not all) ~ seem to have some 'poor issues' with Monterey macOS12.x.

Yes, I'd be torqued a little too; but I've had it worse. By choice? Maybe.

From early May 2003, on occasion and by immeasurably slow dialup,

I was able to slowly read Apple Support Discussions.. (& participated

in same-such; as non-official 'AppleLinks' forum) and joined others.

Mostly to see what I could learn about 'the-then' newest Macs.

And these 'communities evolved' from an easier going era, too.

Good luck & happy computing!🌞🌙❄️🌤

I am severely depressed from MacOS update, and my friend is having big problems with his Macbook too.

I am asking community members how can I help my friend getting the $600-800 logical board replacement repair thru Support? He doesn't not have much money so he would like an economical solution. He cannot work and do his job with it as it cannot boot up.

:-(

..tilen:

There had been a firmware update involved, to enable a later Monterey 12.x upDate or upGrade.

And that is where to address a service tech; someone who knows how to upgrade firmware.

Haven't kept up on details; have too many 'irons in the fire' so to speak here. You've had it light -

compared to the depths I've gone. ~ And finally Apple support in California called (the now failed

AASP in Anchorage) to tell them "just do what the customer said; he's fully trouble-shot this and

the answer appears that he's correct in this."

I was able to fully troubleshoot and isolate the cause; and repeatedly made it kernel panic, etc;

in Seven Steps from boot. Until it froze; then restart to start over again. And it was combination

of what an AASP did while in "their care" ~ and a hardware failure, the unit shipped with.

At least a few times I had to attempt Apple they weren't here; Unavailable. Only reason I had new

Hardware and AppleCare. The AASP and 8 months of 200+ miles driving; to see what ONE of four

could do... So now, Most of my gear now is decidedly older with newest, fast becoming vintage.

My answer could be to buy all new stuff; with Fixes built-in!

(What's money.?

🐌🌻❄️🌿🐢

.When I've none.)