Macs and Document Issues

Hi, brand-spankin' new Zoho CRM user here... My partner is on a PC and I am on a Mac, and we're uploading our info and beginning our zoho experience. As we are testing the CRM functions, I'm concerned about a situation I encountered. I can see a Word attachment, but when I click on it to open, I get no response. Is this a Mac issue, a setting issue, etc.??? What's up? Has anyone encountered this and/or can anyone help us?

Many thanks!