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2020 MacBook Pro stop recognizing all 4 ports immediately after installing Monterey. Couldn’t charge, laptop died, Genius Bar sent it out for new logic board! Tried to fix firmware first - no luck. Not good….
 
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I don't know if this is the same or a related problem. I got a new M1 MBP and decided to get rid of my old 2014 MBP (can not upgrade it to Monterey). I erased the data drive while in Disk Utility (I believe this may have been a mistake). the computer would not boot from a USB install disk for BigSur. After trying it would appear to be bricked. I repowered, cleared PRAM or NVRAM or whatever it is, and did an internet recovery.

This worked fine (except, ugh, I forgot how Mavericks looked), I downloaded the Big Sur OS from App Store. Went into recovery mode, selected Disk Utility, erased the entire drive and formatted with APFS, quit drive utility and installed Big Sur. All went normally thereafter.

It is worth a try. Especially if the installer is getting lost in some quagmire. Not saying this should happen, but what clued me in was reference to older machines Who knows what they were running. If they don't meet minimum Monterey specs, that is on the person installing. Go back to Big Sur.
 
Yeah, my 2019 MBP 16” is having issues with my elgato TB3 dock and an external camera; I can boot without the devices attached and sometimes can attach them post boot to give me my peripherals back (2 monitors, keyboard, USB drives) but oftentimes the laptop just freezes when I attach the TB3 dock.
If I try to boot with the TB3 dock attached it usually goes to black screens and is unresponsive on startup.
If I leave it running over night, I usually find it unresponsive in the morning.
Looking forward to the next update to fix this.
 
My wife has an older macbook air and I have no intention of putting it on that device. If she decides she needs a new computer, it can come installed. In fact it was dicey to put it on this machine.
 
A couple of days ago I updated my 2015 15" MacBook Pro to Monterey and yesterday my battery got swollen. It's a two year old battery that was put in by Apple in 2019 as a part of a recall. Obviously, I cannot claim any connection here, but it got me thinking...
 
Do Intel Macs have DFU mode? I have an M1 mini running Monterey and a 2019 16" MBP running Catalina that I want to upgrade to Monterey. Should I upgrade to Big Sur first with the full installer that I have?
Your 2019 Mac has it. Before install, check for updates for your current macOS, install them and after you machine is up to date you can upgrade to Monterrey.
Also, before install anything is always safe to check the disk with Disk Utility.
 
@MacinMan On a legacy machine, macOS Monterey will not patch the firmware. Which seems to be the main problem here.
Actually, not completely true, it will try to install but OCLP prevents this, OCLP spoofs the unsupported mac to a newer mac, the problem then arises that the Installer thinks it needs a firmware update, it will most likely brick the Mac, but, it won't due to OCLP preventing the installer to do so.
 
The best version for your device is the OS that came with it...

Citing an iPhone example:
iOS 7 was released along side iPhone 5s and iPhone 5c
iOs 7 on iPhone 4 was very slow and even after the iOS 7.1 update it is still slow

Another iPhone example:
iOS 9 was released along side iPhone 6s and 6s Plus
iOS 9 on iPhone 4s was very slow and the only way to have it usable again is to downgrade

So from what I can see, both Big Sur and Monterey are best to be used only on Apple Silicon Macs... Unless you're one of the few who did not experience having their device bricked after the update...
 
First there were issues with unrecognized usb hubs. Now there are bricked Macs. This time I am going to wait before I upgrade.
 
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I'm enjoying all the calls for Apple's head in this thread, based solely on a few tweets and forum posts. How many millions of machines were updated successfully (and weren't tweeted about)? And what other information are we missing for those machines that didn't? There's a severe lack of statistical grasp here, and a blindingly quick rush to judgment.
 
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macOS Monterey, released last week as the latest version of macOS, is bricking older Mac computers, rendering them unusable and unable to even turn on, according to a number of reports from users across social media and online forums.

This has happened since 10.4 TIGER. In the case of those times, the bricking came from Application Enhancer.

Now if this is APPLE deciding to brick their computers, then they have turned the macOS into a pile of sheer garbage.
 
Monterey upgrade bricked my 2020 27" iMac. Phone support could not revive and sent me to Genius Bar, who still has it because they could not revive it either. The status page says they are waiting for parts. So who knows. Could be that the upgrade process triggered some kind of hardware failure.
 
I'm enjoying all the calls for Apple's head in this thread, based solely on a few tweets and forum posts. How many millions of machines were updated successfully (and weren't tweeted about)? And what other information are we missing for those machines that didn't? There's a severe lack of statistical grasp here, and a blindingly quick rush to judgment.
This is unfortunately an annoying quirk amongst the general population. A few instances of an issue out of millions means that there's an issue.

For everyone else. Let's assume that there were a million installs last week.

There are like 10 tweets with issues. So thats:

10 / 1,000,000 * 100 = 0.001


A GRAND TOTAL OF 0.001 % OF USERS WHO UPDATED THE OS AND HAD ISSUES. This is likely NOT the result of faulty software or else we would have thousands more people flooding twitter.


THIS IS A NON ISSUE
 
Another case of why "I never update to the latest MacOS until a year later after multiple patches"
 
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Can someone clarify for me. I see the reports “don’t turn on” and people saying “brick”. So the update actually caused power to no longer work? Can they boot into internet recovery? Boot from USB? Or is it truly “bricked”?
 
This is why I wait 30 days after the last point release to update any of my devices.

If it's working perfectly fine now then why be in a rush to update?
 
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