I am also having this issue on a MacBook Pro. I have the most up-to-date version of Chrome and Evernote installed. I uninstalled and reinstalled both. I've uninstalled and reinstalled the web clipper, quit the browser and restarted it. I still can't login. There is a red circle next to the clipper icon. Clicking on the icon does not yield a response. Right clicking, then clicking on "clip bookmark" gives me the error message "You must sign in using the Clip To Evernote toolbar button before you can make clips." There is no option to sign in. I use the clipper on my work iMac without a problem, even with my Chrome settings synced. I'm also able to use the clipper on the MacBook Pro with Safari. Any advice?