Seqouia 15.1 software update error

Getting an error after downloading 15.1


Failed to prepare the software update. Please try again.


An error occurred while downloading the selected updates. Please check your internet connection and try again.


MacBook Pro 15″ 2018

OS 15.0.1 (24A348)


Internet is fine, 60gb free space


Appreciate any suggestions

MacBook Pro 15″, macOS 15.0

Posted on Oct 29, 2024 12:18 PM

Reply
Question marked as Top-ranking reply

Posted on Oct 30, 2024 2:55 AM

There are factors:


Some which are beyond your control and those with are totally under your control


Slow wifi connection


Too many other people downloading at the same time and Apple  Servers are overloaded


Software on the computer interfering with the download process including AntiVirus Software


Notation: Disabling the AV Software may or may not solve the issue.


Removal of the AV Software may increase the chances of the download to perform as expected.


Running behind a VPN which may increase Packet losses or corruption of the download 


If via wifi  & too many Other devices using the wifi at the same time reducing the Bandwidth to your computer. 


Best Results are via Ethernet Cable to Router


Restart in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal 


Try Again using the Software Update Applet in System Preferences / Setting 


Worst case - Restart in Recovery Mode and choose Reinstall macOS. 


This in theory will pull the latest version of macOS this computer qualifies to run 

35 replies

Nov 3, 2024 7:29 AM in response to Millagorilla

I’m on a mac mini 2018, so intel Mac. Cant’ update to 15.1. Not running any vpn or AV

Download succeeds, but the hang in preparing for quite a while and eventually failing with the aforementioned error.


I tried;

  • turning on/off sharing cache
  • turn of find my Mac
  • reboot and update in safe mode
  • same, but also signed out of iCloud
  • creating a brand new empty admin account and update


I’m at a loss here, need my Mac for software development, so any more help/tips would be welcome! 🙏

Nov 20, 2024 7:20 PM in response to Millagorilla

US ALERT:

Apple Releases Security Updates for Multiple Products - Cybersecurity and Infrastructure Security Agency (CISA)


Release Date: November 20, 2024


Apple released security updates to address vulnerabilities in multiple Apple products. A cyber threat actor could exploit some of these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review the following advisories and apply necessary updates:

This product is provided subject to this Notification and this Privacy & Use policy.


https://www.cisa.gov/news-events/alerts/2024/11/20/apple-releases-security-updates-multiple-products


Oct 30, 2024 5:06 AM in response to doublezest

doublezest wrote:

Thanks
No VPN, no AV and laptop connected via Ethernet cable directly to 1GB hub.

Recovery mode option is too drastic for this. Shouldn’t Apple fix the upgrade?

Updated 3 Different Apple Silicon computers from 15.0.1 to 15.1 on the day of release using the Software Update applet


Done over Wifi 6E via a 1 GB Up / Download Speed from ISP


Arrive at you own concluding as to the Remedial Actions needed to achieve the desired results


This implies, there was No Need for Apple to Fix that which was not Broken, in my setup

Nov 3, 2024 1:32 AM in response to Owl-53

Ok, I did that and it apparently downloaded the installer. But how to perform the installation? It didn't actually install anything.


2018 MBP 15" (MacBookPro15,1) currently running Sequoia 15.0.1. Plenty of free disk space (over 300GB), very fast internet and wi-fi. I have literally tried updating at least 10 times over many days now and it always fails with the same error: Failed to prepare the software update. Please try again.


Never had any issues installing updates before. I have tried some of the workarounds listed here but nothing works.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Seqouia 15.1 software update error

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.