Table of Contents
How to download and install macOS Sequoia 15.1.1 update
Download the macOS Sequoia 15.1.1 installer and IPSW files directly
macOS Sequoia 15.1.1 Release Notes
Home System Tutorial MAC MacOS Sequoia 15.1.1 with Security Fixes Available Now

MacOS Sequoia 15.1.1 with Security Fixes Available Now

May 09, 2025 am 09:40 AM

Apple released the macOS Sequoia 15.1.1 update, a small software update that mainly contains important Mac security fixes. This update does not contain any new features, but fixes multiple security vulnerabilities that are being actively exploited, so it is highly recommended that you install this important update on your Apple device.

In addition, Apple has released iOS 18.1.1 for iPhone, iPadOS 18.1.1, visionOS 2.1.1, iOS 17.7.2 and iPadOS 17.7.2, all of which include the same security patches.

How to download and install macOS Sequoia 15.1.1 update

Before starting any system software updates, it is best to use Time Machine for backup:

  1. Go to the  Apple menu and select System Settings
  2. Go to General and select Software Update
  3. Later you will see "macOS Sequoia 15.1.1" displayed as available for download, select "Update Now" to start the installation process

MacOS Sequoia 15.1.1 with Security Fixes Available Now

You must restart your Mac to complete the installation of macOS Sequoia 15.1.1.

If you are running a beta version of Sequoia 15.2, you won't see this update.

Download the macOS Sequoia 15.1.1 installer and IPSW files directly

The following link points directly to the Apple CDN server to download macOS Sequoia 15.1.1. Note that for some reason, the M4 Mac family has different installers and IPSW files, so if you are using an M4 Mac, make sure to get a version specific to these devices.

  • MacOS Sequoia 15.1.1 InstallAssistant.pkg (version 24B91)
  • MacOS Sequoia 15.1.1 InstallAssistant.pkg (version 24B2091 – M4 Mac only?)
  • MacOS Sequoia 15.1.1 (version 24B91) IPSW
  • MacOS Sequoia 15.1.1 IPSW (version 24B2091)

The installer package file can be used to install the latest version of Sequoia on multiple Macs, as well as to create USB installers and boot disks, and the IPSW file can be used to restore Macs and easily set up virtual machines.

macOS Sequoia 15.1.1 Release Notes

Release Notes are brief:

This update provides important security fixes that are recommended for all users to install.

For security content information about Apple software updates, visit this website: https://www.php.cn/link/53b1ab0fb54159c63dc80b31554ed473

While installing updates for your Mac, don't forget to update your iPhone, iPad, and other Apple devices.

The above is the detailed content of MacOS Sequoia 15.1.1 with Security Fixes Available Now. For more information, please follow other related articles on the PHP Chinese website!

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