Answered By: Katherine Santana
Last Updated: Sep 02, 2025     Views: 1147

If you are prompted for a product key code, it means the installation was not completed correctly. Please follow the steps carefully for your version of EndNote: 

EndNote 21  

  • For Mac: Download the EndNote21SiteInstaller.dmg file. Move the file from your Downloads folder to your desktop. Open the EndNote21SiteInstaller.dmg file and double click the EndNote installer window to begin installation. 

  • For PC/Windows: Download both the EN21Inst.msi and License.dat files onto your desktop. Locate the EN21Inst.msi file from your Downloads folder and double click to begin installation.  

EndNote 2025  

  • For Mac: Download the EndNote2025SiteInstaller.dmg file. Open the EndNote2025SiteInstaller.dmg file and double click the EndNote installer window to begin installation. 

  • For PC/Windows: Download both the EN2025Inst.msi and License.dat files onto your desktop. Locate the EN2025Inst.msi file from your Downloads folder and double click to begin installation. 

Installation instructions for both EndNote 21 and EndNote 2025 can be found on our Installation Instructions page. 

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