Caso aconteça com alguém:
Why macOS updates might brick your Mac, and what you can do about it
(Por que as atualizações do macOS podem bloquear o seu Mac e o que você pode fazer a respeito)
Mac OS X Monterey 12.0.1
instalação limpa (do zero)
Imac 5K 27" late 2015
3,3 GHz Inter Core I5 Quad-Core
16 GB RAM
AMD Radeon R9 M395 2GB
Fusion Drive
Fui testar alguns softwares na Nikon:
Picture Control Utility 2 v2.4.8 (15/07/2021)
Programa logo após abrir é encerrado. Não consegui fazer funcionar.
NX Studio v1.0.1 (15/07/2021)
Aparentemente funcionando bem.
Apple Fixes Bug That Bricked Some Intel Macs After macOS Monterey Install
Atualizando:
Picture Control Utility 2 v2.4.9 (09/11/2021)
Programa logo após abrir é encerrado. Não consegui fazer funcionar.
Mac OS Monterey 12.1
Mac OS Monterey 12.2.1
Importante para quem instalou o Mac OS Monterey 12.2:
macOS 12.2.1 provides important security updates and fixes an issue for Intel-based Mac computers that may cause the battery to drain during sleep when connected to Bluetooth peripherals.WebKit
Available for: macOS Monterey
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: A use after free issue was addressed with improved memory management.
CVE-2022-22620: an anonymous researcher
macOS Monterey 12.3
14/03/2022
Para atualizar acesse as Preferências do Sistema no Menu Apple, depois vá em “Atualização de Software”.
macOS 12.3 adds Universal Control so you can use a single mouse and keyboard across your Mac and iPad. This release also includes new emoji, dynamic head tracking for Music, and other features and bug fixes for your Mac.
Universal Control (beta)
Universal Control allows you to use a single mouse and keyboard across iPad and Mac
Text can be typed on either Mac or iPad and you can drag and drop files between them
Spatial Audio
Dynamic head tracking is available in Music with supported AirPods on Mac computers with the M1 chip
Customizable spatial audio settings for Off, Fixed, and Head Tracked are now in Control Center with supported AirPods on Mac computers with the M1 chip
Emoji
New emoji including faces, hand gestures, and household objects are available in emoji keyboard
Handshake emoji allows you to choose separate skin tones for each hand
This release also includes the following enhancements for your Mac:
Siri now includes an additional voice, expanding the diversity of options
Podcasts app adds episode filter for seasons, played, unplayed, saved, or downloaded episodes
Safari webpage translation adds support for Italian and Chinese (Traditional)
Shortcuts now supports adding, removing, or querying tags with Reminders
Saved passwords can now include your own notes
Battery capacity readings have improved accuracy
This release also includes bug fixes for your Mac:
News widgets in Today View may not open articles when clicked
Audio may sound distorted while watching video in the Apple TV app
Some photos and videos may be unintentionally moved when organizing albums in Photos
Bem, passados os 6 meses do lançamento, continuo no “Bug” Sur.
Não vi nada no Monterey que justificasse a atualização.
Atualizei tudo, rodando 100% 
Carlos,
Você não usa Applescript nem Automator né ? Precisava muito saber em que pé está isso.
Não uso nada 
Atualizei para o 12.3 por causa do Universal Control.
Como uso bastante o iPad Pro, e, as vezes o uso de segundo monitor, gostei muito do novo recurso.
macOS Monterey 12.3.1
31/03/2022
Correção de erros:
Some 2021 MacBook Pro models cannot update or restore to macOS Monterey 12.3
USB-C or Thunderbolt external display does not turn on when connected to Mac mini (2018) as a second display
Bluetooth devices, such as game controllers, may disconnect from your Mac after playing audio through some Beats headphones
Atualizações de segurança:
AppleAVD
Available for: macOS Monterey
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: An out-of-bounds write issue was addressed with improved bounds checking. Apple is aware of a report that this issue may have been actively exploited.
CVE-2022-22675: an anonymous researcher
Intel Graphics Driver
Available for: macOS Monterey
Impact: An application may be able to read kernel memory
Description: An out-of-bounds read issue may lead to the disclosure of kernel memory and was addressed with improved input validation. Apple is aware of a report that this issue may have been actively exploited.
CVE-2022-22674: an anonymous researcher
O meu Mac Mini continua dando uns bugs com teclado. Hoje mesmo tive que desconectar o cabo USB e reconectar para resolver problema de tecla presa. Certeza que não é problema do teclado já que uso ele normalmente no PC Windows e nunca tive nada.
Alguém mais tem isso de travar tecla em teclado cabeado?
teclado tá ligado direto no Mac ou em um hub?
Se você iniciar o Mac Mini no modo de segurança esses bugs no teclado persistem?
O teclado tá ligado direto na porta USB A do Mac, mas estou desconfiando que tem a ver com o Hub USB 5 em 1 da Baseus que tá nele. Hoje reparei que deu isso e estava com o leitor de cartão ligado no Hub USB.
O chato desse Hub é que se desconectar o leitor de cartão ele dá uma apagada no monitor que tá na saída HDMI dele.
Esse modelo que vc está usando?
:ponder:
estranho isso.
Esse mesmo!
macOS Monterey 12.5
macOS Monterey 12.5 includes enhancements, bug fixes and security updates.
TV app adds the option to restart a live sports game already in progress and pause, rewind, or fast-forward
Fixes an issue in Safari where a tab may revert back to a previous page
Some features may not be available for all regions, or on all Apple devices.