MacBook Pro 16-inch 2019 refuses updates past macOS 12.7.3

Timothy Elliott1 wrote:

<EtreCheckPro 6.8.9 report generated: 2025-03-01.log>

I've tried installing the 12.7.6 Monterey update from the Software Update panel and as a standalone download. I've tried installing Sonoma and Sequoia from Software Update and as standalone downloads. Last night, I booted into the recovery mode using the option+command+R variation designed to install the latest compatible MacOS. In each case, the installer downloaded correctly, but the installs all failed with no context for what caused the failures. Disk Utility First Aid reports no issues. I'll include the EtreCheck details below. The MBP (2.4 GHz 8-Core Intel i9 32GB) has started running hot and crashing on Monterey. MS Teams recently balked at working with Monterey because it's out of date. I always appreciate the insights and suggestions from the Apple Community members. Any thoughts?

<Apple security disabled - Apple security software is disabled.> at the very least I recommend this be on.

<avast> Anti-virus look for a built in in app uninstaller— if in doubt search developers website.

If you are using a VPN disable it. <NordLynx - /Applications/NordVPN IKE.app>

If you turned on the Firewall turn it off

Remove any Anti-virus software— this competes directly with the built in Apple AV and known to cause issues.

Try running your software update from a SafeBoot mode  Start up your Mac in safe mode - Apple Support

you have some issues here— which is a different topic of conversation:

Diagnostics Information (past 60 days):

2025-03-01 00:08:38 /Library/Logs/DiagnosticReports/ProxiedDevice-Bridge/eligibilityd-2025-02-27-215204.ips Crash (716 times)

First occurrence: 2025-02-21 13:31:32

2025-02-28 19:55:32 /Library/Logs/DiagnosticReports/ProxiedDevice-Bridge/corespeechd-2025-02-24-133219.ips Crash (4 times)

First occurrence: 2025-02-24 13:32:19

2025-02-28 08:49:54 lsd Crash (6 times)

lsd in OS X is the LaunchServiceDaemon. launchd is a launch daemon manager! support for launching apps and matching document types to apps.

Timothy Elliott1 wrote:

I'm not sure what the "ProxiedDevice-Bridge" is that's causing the high number of crash reports.

From my understanding this has to do with the T2 security chip which has its own ARM based OS.

Most likely your Logic Board is bad which is unfortunately very common with the MacBook Pro 16" (2019) model specifically.

I personally do not recommend spending any money on repairs for this laptop for multiple reasons, but especially for the high failure rate of this model's Logic Board. There have been multiple reports from users on this forum that even replacement Logic Boards have had issues sometimes immediately after getting them home from the repair. The money spent on repairs is better put towards a new laptop.

In addition to remove that worthless user-added VPN, Avast must GO.

you also need to believe that MacOS security, with its locked system volume, with protect you and stop running Malwarebytes all the time as well.