Install or update vetHP

Install vetHP for Horos

Note – If using Mac Catalina OS 10.15, see security permissions steps below prior to beginning.

  • Install version vetHP2.1.7.horosplugin for all versions of Horos
  • Download the zip file from your purchase email (valid for 1 week after purchase).
  • You may double click on the file to use its installer. If it does not install, go to the next step.
  • Unzip the file with your utility application.
  • Quit Horos.
  • Go to user/library/application support/horos/plugins
  • Place the unzipped file into the plugins folder (vethp.horosplugin)
  • Restart Horos
  • Open a study
  • Go to format/customize toolbar or right click on the toolbar, and drag the VetHP icon into the toolbar.
    • If not in toolbar options, check that plugin is inĀ user/library/application support/horos/plugins. If not, repeat above steps.
  • Click on VetHP icon to set preferences

Osirix Version 10+

Note – If using Mac Catalina OS 10.15, see security permissions steps below prior to beginning.

The update to Osirix version 10 caused an irreversible split in the code shared between Horos and Osirix. You will now need a separate version of the plugin to install and use with Osirix or Osirix Lite. This mainly affects imaging orientation in the 3D MPR viewer. Please email us if you purchased vetHP prior to 2020 and need an updated copy.

Mac Catalina OS 10.15 Security permissions

VetHP 2.1.7 works with Catalina (OS 10.15) and Horos up to version 4.0. Users have reported security issues as described below.

OSX Catalina provides some security blockades for unknown publishers including Lucent Media. You may see the error message “vetHP.osirixplugin” Cannot be opened because the developer cannot be verified.

Apple instructions – Please visit for troubleshooting this issue. We suggest re-installing the plugin if it has been removed from Horos through security settings. Please email us at to reactivate your download link if you have not saved a copy. Follow the installation instructions above.

Please email us with detailed reports of other issues. Our investigations so far suggest the problem is with Catalina, not with the plugin itself.

Steps for security

This warning message will appear.

Open Security and Privacy preferences, General tab. Click lock and enter password.

Click on “open anyway” button and enter your password.

Click on restart now.

Open a study, right click on toolbar, and drag VetHP icon into your main toolbar. Click on it to select options.