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Geraldod's avatar
Geraldod
Copper Contributor
Apr 24, 2026

macOS Sequoia dmg download for making usb installer on windows?

Replaced the internal SSD of my MacBook Air and I need to reinstall macOS Sequoia on it. Now, I get a bit confused about the download part. Most guides mention downloading the installer first, but I'...
HoltSawye's avatar
HoltSawye
Iron Contributor
Apr 24, 2026

This is the official and most reliable method for downloading macOS Sequoia and creating a bootable drive, but you’ll need an additional Mac to complete the process. If you want to safely download macOS Sequoia and create an installation medium, just follow the steps I’ve provided.

How to download macos sequoia

Step 1: Download macOS Sequoia from the App Store

  • On a Mac that is running normally, open the App Store.
  • Search for macOS Sequoia.
  • Click Get or Download; the installer will automatically be saved to the Applications folder.

Step 2: Create a bootable USB drive

  • Insert a USB flash drive with at least 16 GB of storage.
  • Open Terminal and run the following command:

sudo /Applications/Install\ macOS\ Sequoia.app/Contents/Resources/createinstallmedia --volume /Volumes/MyUSB

Step 3: Replace MyUSB with the actual name of your connected USB drive before executing.

Cons

  • You must rely on another fully functional Mac to download macOS Sequoia and complete the creation process, which limits its usability.
  • The official installer takes up a significant amount of storage space, and creating a bootable USB drive requires a storage device with at least 16GB of capacity.

Despite some limitations, this official method remains the safest and most reliable option for downloading macOS Sequoia and creating bootable media. It ensures system integrity and the security of the original files, making it ideal for users who prioritize system stability and official installation standards.