IS YOUR COMPUTER SLOW? RUN LIKE NEW
If they are not maintained, computers lose performance over time. Norton Utilities Ultimate can help significantly improve the performance of your Windows computers.
Applicable for: Mac
Message: "Couldn't download installation files" while installing Norton apps on mac
This message appears when the Norton installer cannot connect to our servers to download the required installation packages. resolve this issue, we recommend using the Safari web browser to download and install your Norton product.
Unmount the Installer DMG
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On your desktop, locate the Norton installer DMG Mount file.
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If you see multiple Norton installer DMG files on your desktop, right-click on the older DMG file and click Eject “Install Norton”.
Delete any old Norton Setup files from Downloads
- On your Mac, click the Finder icon
in the dock, then click Go > Downloads
- Delete all Norton Installer and Setup files.
Disable VPN and other conflicting apps
- On your Mac, click the Finder icon
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Check for any conflicting apps, including VPN apps, and temporarily turn them off until the Norton app download is complete.
- After disabling any VPN or other security apps, try reinstalling your Norton app.
For detailed instructions on how to download and install the app, click the link for the product you want to install,
- Norton Device Security: Download and Install Norton device security product on Mac
- Norton Utilities Ultimate: Download and Install Norton Utilities Ultimate
Last modified: 05/14/2026
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