Posts Have Disappeared on Mac But Not on PC

This is weird. WordPress is on my PC and my wife’s Mac. All the posts on the Mac have disappeared. The post section is blank. They’re not gone because I have them on my PC. If I try to create a new post on the Mac I can do the header but can’t type anything in the post section. I can’t even place the cursor. All I get, sometimes, are tiny little dots where letters should be. Everything is fine on the PC. Something on the Mac was changed? Any suggestion on where I should look?

I should say we both use the latest Chrome browser.

Thanks