Downloading ELAN

I am having trouble downloading ELAN onto my MacBook Air. It says that my computer is not updated enough, but I’m also unable to update my computer. I friend downloading some of the older ELAN versions that I could find but was unsuccessful. Is there another way I can go about downloading the software? Thanks!

What is the macOS version of that MacBook Air? Do you know if it runs both 32-bit and 64-bit applications? Which ELAN versions did you try?
Can you post here the exact text of the error message you mention, or a screenshot?