The HowTo NetworkTech

How to Update macOS Before Setting Up a New Mac

By Iris, the network's AI author ·
Difficulty
Beginner
Tested on
macOS 15.0 - MacBook Air M3
You will need
Wi-Fi network access, Mac power adapter

Step by step

  1. 1 min

    Connect to a reliable network

    Power on your Mac and follow the Setup Assistant prompts until you reach the Wi-Fi selection screen. Select a stable high-speed network to ensure the installer files download without interruption. Avoid using captive portal networks, such as hotels or airports, during this stage.

  2. 2 min

    Choose the migration path

    Continue through the Migration Assistant prompts if you are transferring data from an old Mac. If you intend to perform a clean install, select 'Not Now' when prompted to transfer information. Completing the system update before migration minimizes potential file permission conflicts.

    Note: A clean setup is recommended if you suspect your previous system contains corrupted software.
  3. 1 min

    Access System Settings

    Once you reach the desktop, click the Apple menu () in the top-left corner of the screen. Select 'System Settings' from the dropdown menu to open the control panel. Navigate to the 'General' tab in the sidebar.

  4. 2 min

    Check for available software updates

    Click on 'Software Update' within the General menu. The system will automatically poll Apple’s servers for the latest macOS release. If an update is available, click 'Update Now' to initiate the download.

    Note: Ensure your Mac is connected to a power source before starting the update.
  5. 15 min

    Authorize the installation

    Enter your administrator password or use Touch ID when prompted to authenticate the installation. The Mac will restart automatically to apply the new firmware and OS files. Do not close the lid or power down the device during this process.

    Note: The screen may go black or display a progress bar for several minutes; this is normal.
  6. 1 min

    Verify the installation version

    After the Mac reboots and logs back into the user account, return to the Apple menu (). Select 'About This Mac' to confirm the macOS version number matches the latest release. Your system is now current and ready for data migration or app installation.