Or replacing the Mac with a newer model, though that's not cheap.
I'd guess it's probably something about the version of OS X being too old?Īccording to Google, OS X 10.9 is required for the current version of Chrome, which means you'll need to select and use a different web browser such as an older version of Firefox, or find an older version of Chrome that supports 10.7.5, or a different operating system, or (if your Mac supports it) upgrading to a more recent version of macOS such as 10.12 Sierra.
What's the error message that's being displayed when the download fails?