Depending on your ESET product, delete one of the following files: /Applications/ESET Cyber Security/Contents/Helpers/Uninstaller.app or /Applications/ESET Cyber Security Pro/Contents/Helpers/Uninstaller.app
Open the 6.5 installation file (either from a previously downloaded DMG file or from an installation CD/DVD).
Restart your computer.
Download (or use an installation CD/DVD) and install ESET Cyber Security or ESET Cyber Security Pro version 6.5. During the installation in the Version Check step deselect the Download and install new version option.
Download ESET Cyber Security or ESET Cyber Security Pro
By downloading an older version of this product you explicitly agree to the term and conditions of the new End-user license agreement: