Unable to install macOS Sequoia update 15.4 on my MacBook Pro

How much free space on your system drive?

Has SIP ( System Integrity Protection ) been disabled

To check if System Integrity Protection (SIP) is enabled or disabled on your macOS, open Terminal and type csrutil status then press Enter. The Terminal will then display whether SIP is "enabled" or "disabled". 

% csrutil status

System Integrity Protection status: enabled.

Second thoughts

Based upon this similar question doing the 15.4 Update

Apple Servers maybe having issues

https://discussions.apple.com/thread/256030016?login=true&sortBy=oldest_first

Yes

So what does the Terminal command below report ? ?

softwareupdate --fetch-full-installer --full-installer-version 15.4

If an error occurred while updating or installing macOS - Apple Support

Sub Section " Install from macOS Recovery "

" To ensure that no other software on your Mac can interfere with installation, "

Yup it would because Apple appears to Not Have uploaded the Full Version 15.4

It may appear via the Terminal command but in reality it is Not Yet Available as a " Full Version "

You can wait a few days and try the terminal command again

Or, explore >>

If an error occurred while updating or installing macOS - Apple Support

@PRP_53

You haven't said how it should be.. enabled or disabled :)

I've experienced the same error yesterday and I've tried the command this morning. Here's the result

softwareupdate --fetch-full-installer --full-installer-version 15.4

Scanning for 15.4 installer
Install failed with error: An error occurred while running scripts from the package “InstallAssistant.pkg”.
Error Domain=PKInstallErrorDomain Code=112 "An error occurred while running scripts from the package “InstallAssistant.pkg”." UserInfo={SUErrorUpdateTitle=macOS Sequoia, NSURL=file:///Library/Updates/082-16524/InstallAssistant.pkg, PKInstallPackageIdentifier=com.apple.pkg.InstallAssistant.macOSSequoia, NSLocalizedDescription=An error occurred while running scripts from the package “InstallAssistant.pkg”., SUErrorRelatedCode=SUErrorCodeInstallFailure, NSFilePath=./postinstall.sh, SUErrorUpdateProductKey=082-16524}

nickglm wrote:

@PRP_53

You haven't said how it should be.. enabled or disabled :)

Interesting observation and a valid question

Under normal and regular conditions it should be ON

In a special circumstance, a person may need to turn it Off Temporarily and Turn it ON again

For additional reading which is all very technical stuff

System Integrity Protection

About System Integrity Protection on your Mac

Operating system integrity

Pinath wrote:

I've experienced the same error yesterday and I've tried the command this morning. Here's the result

softwareupdate --fetch-full-installer --full-installer-version 15.4

Scanning for 15.4 installer

Install failed with error: An error occurred while running scripts from the package “InstallAssistant.pkg”.

Error Domain=PKInstallErrorDomain Code=112 "An error occurred while running scripts from the package “InstallAssistant.pkg”." UserInfo={SUErrorUpdateTitle=macOS Sequoia, NSURL=file:///Library/Updates/082-16524/InstallAssistant.pkg, PKInstallPackageIdentifier=com.apple.pkg.InstallAssistant.macOSSequoia, NSLocalizedDescription=An error occurred while running scripts from the package “InstallAssistant.pkg”., SUErrorRelatedCode=SUErrorCodeInstallFailure, NSFilePath=./postinstall.sh, SUErrorUpdateProductKey=082-16524}

Nothing has changed since Yesterday to Today

Apple Apps Store is still showing Sequoia 15.3.2

It may appear via the Terminal command but in reality it is Not Yet Available as a " Full Version "

You can wait a few days and try the terminal command again

The funny thing is that if you click 'download,' MacOs shows 15.4 in the process of downloading, but I'm not sure if I want to do a full re-installation on a corporate-managed machine. Will it preserve all of my files and settings? I just wanted to update as usual, but it constantly gives me that error. I have no clue how to fix it. ( I tried literally everything.)

DmytroT wrote:

The funny thing is that if you click 'download,' MacOs shows 15.4 in the process of downloading, but I'm not sure if I want to do a full re-installation on a corporate-managed machine. Will it preserve all of my files and settings? I just wanted to update as usual, but it constantly gives me that error. I have no clue how to fix it. ( I tried literally everything.)

" not sure if I want to do a full re-installation on a corporate-managed machine "

A Full re-installation ?

What do you mean by Full Re-installation ?

Corporate - Managed machine ?

Check with the Company IT Department

It is Their Machine to support and to have Tested if this will or will Not work