Upgrading and Modifying InterSystems IRIS Upgrade Overview Compatibility Goals Before Upgrading Upgrading or Modifying on Windows Windows Upgrade Procedure Reinstall or Uninstall Unattended Upgrade or Reinstall Unattended Removal Upgrading or Modifying on UNIX®, Linux, and macOS UNIX®, Linux, and macOS Upgrade Procedure Uninstalling on UNIX®, Linux, and macOS Upgrading a Mirror Choosing Mirror Upgrade Procedure Adding Mirror Members During an Upgrade Mirror Upgrade Terms Mirror Upgrade Procedures Upgrading ECP Configurations Post-Upgrade Tasks Maintenance Release Post-Upgrade Tasks Major Version Post-Installation Tasks