Where to Download macOS Sonoma Installer (installassistant.pkg)

Last updated: Sep 27, 2023
Summary: This post introduces where to download macOS Sonoma installer and how to install macOS Sonoma on your Mac.

If you want to download macOS Sonoma installer to install the latest macOS on your Mac computer, you can check where to get the macOS 14 full installer file and how to install macOS Sonoma on your Mac below.

macOS Sonoma installer

Where to Download macOS Sonoma Full Installer

Source 1. From a Reliable Download Website

You can download the full installer of macOS Sonoma from a reliable website like Apple content delivery website. You can enter the link in your browser: https://swcdn.apple.com/content/downloads/26/09/042-58988-A_114Q05ZS90/yudaal746aeavnzu5qdhk26uhlphm3r79u/InstallAssistant.pkg.

Press Enter to download installassistant.pkg of Sonoma. You can find and launch the macOS 14 installer from the Applications folder after downloading.

Source 2. From Apple App Store

macOS Sonoma was officially released on September 26, 2023. Apple provides the official download resource of the macOS Sonoma installer file (installassistant.pkg) in App Store. You can open App Store on your Mac to search for it and download the installer.

Source 3. From Software Update Screen

The easiest way to download and install macOS Sonoma on your Mac is through Software Update. Check the detailed instructions below.

How to Install macOS Sonoma on Your Mac

  1. Click Apple > System Settings > General > Software Update.
  2. Let your Mac automatically check if macOS Sonoma 14 is rolled out for your Mac.
  3. If you see macOS Sonoma displayed, you can click Upgrade Now to follow the instructions to install macOS Sonoma on your Mac.
Download and Install macOS Sonoma
You can make a backup of your Mac before you update to the new Mac OS in case something goes wrong.

Can You Upgrade to macOS Sonoma?

Macs that meet the requirements below can directly upgrade to macOS Sonoma.

Mac models: iMac (2019 or later), iMac Pro, MacBook Air (2018 or later), MacBook Pro (2018 or later), Mac Mini (2018 or later), Mac Pro (2019 or later), Mac Studio (2022 or later).

You should check for macOS Sonoma compatibility if you want to install the new OS on your Mac. If your Mac doesn’t support macOS 14, you may check: How to Install macOS Sonoma on Unsupported Macs.

Use BuhoCleaner to Release Space on Your Mac

The new Mac OS is about 13GB. You should make sure that your Mac has enough space to install it. To free up space on your Mac, you can use BuhoCleaner.

BuhoCleaner is a professional Mac cleaner software program that helps you clean your Mac from all aspects.

You can use it to scan and remove junk data on your Mac, deeply uninstall unneeded apps, find and delete large files and duplicate files, analyze disk space, boost startup speed, monitor system status in real-time, free up RAM, flush DNS cache on your Mac, and more.

Free DownloadFor macOS 10.10 and above
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This post mainly introduces where to download macOS Sonoma installer (installassistant.pkg) and install macOS 14 on your Mac. Hope it helps. For more useful Mac/iPhone tips and tools, you may go to Dr.Buho’s official website.


Cassie has been writing about technology for her entire career life - over 10 years. She enjoys diving into how Apple products work and then breaking it down in a way that anyone can understand.