Constant internet connection issues after Sequoia 15.4 update

Frustrating for sure. 😢

Do you have the same difficulty connecting to the Internet when you run your computer in Safe Boot mode?

Procedure here:- Start up your Mac in safe mode – Apple Support (UK)

Please advise.

Note:-

Your Mac should boot into Safe Mode. You’ll know it's working if:

• The words “Safe Boot” appear in the upper-right corner of the login window (In a red font)
• Your Mac might be slower than normal — that’s expected in Safe Mode.

Part 1 of 2

Hum, " Perhaps they should’ve tested 15.4 a little more rigorously before unleashing it."

No Networking issues here

Upgraded ( I own ) 1 M1, 1 M2, 1 M3 and 1 M4 all from 15.0 Initial Release through every single version and landing on current 15.4

Part 2 of 2

If and where applicable

There are 3 Categories of Third Party Software / Services that are baffling.

Why some users insist on installing and using the below software. 

In no special order 

Commercial VPNs 

They may not be what one believes they are doing for the computer and what they actually are doing behind the scenes They may also reduce you Internet Speeds by upwards of 30% 

https://gist.github.com/joepie91/5a9909939e6ce7d09e29

VPN: What you need to know - Apple Community

Third Party Security Software 

There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 

The Operating System resides in a Sealed and Read Only Volume that cannot be opened by the User nor by Third Party Applications.

The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.

Security. Built right in

Mac app security enhancements

The Built in Security  is all that is required to protect the computer.

Protecting against malware in macOS

Third Party Disk Cleaners / Optimizer 

Any Third Party Applications that will interfere with the normal operation of the OS,  is an invitation for disaster. 

Certain Applications maybe available on the Apple Apps Store - this only means the Developer is prepared to pay Apple a percentage on each sale. 

What the Application may do to the computer is up to the User to check this out before purchase

To put the Third Party Disk Cleaner / Optimizer in context and the damages it may have or has already done.

This type of applications can or will Muck Up your User Account ( Home Folder ) of this machine.

It does not touch the Operating System itself unless you consider your User Account ( Home Folder ) as part of the Operating System.

The Operating System is hosed

SMC reset on a MacBook M4 Max ?

You will need to explain that one of you would

Understand that the MacBook M4 Max probably arrived with possibly a Special Build of macOS 15 Sequoia which was Unique to the M4 Max

So downgrading may not be possible

Further, downgrading is not supported by apple nor is it generally suggested

For whatever reason my network would not display as 2 different bands (2.4/5Ghz) tried to separate it into the 2 and was unsuccessful so I had to have someone come out from my fiber company. The router was replaced and we were able to separate the 2. Now I have my Mac connected to the 5Ghz where before it was bouncing back and forth between the 2 and ultimately kicking itself off.

To simplify this

You and not Install an earlier version of Sequoia that the version it Originally came with as new

Every if it did come with 15.3.1 it is not supported by Apple or generally suggested to downgrade

I just updated 2 nights ago and have been having the same issue. its odd too because when i go into the app for my home internet to see what all is connected to the network it shows 11 other devices in the home that are connected but wont show my macbook. I hope there is a fix for this asap

Follow on.

Forgot to mention

Third Party 2 Way Firewalls 

like Lulu and Little Snitch and similar