I am having the same problem. I just installed the Mac app, and I haven't installed Evernote app on any other device. The web interface works fine, but I can't sign in to the app using a Google account. If I try to open the Profile page on the web interface, I am asked for a password. If I enter the Google password, I am told that it is wrong, and I have changed my password five days ago. (That's when I signed up.) I have been using Google sign in since the beginning, so I don't know what this other password is supposed to be.