Wow! And I was just about going to buy this thing. I really like the UI and the integration with Evernote and others. But then, it just crashed and would not start again. Rebooting the Mac many times, with no avail. Clicking Airmail app seems not to start it. And yet, I can sometimes (!!!) see the UI and my mails, and they function. BUT I miss the top bar menus, altogether. So, no access to settings or anything. And browsing Command+tab shows all apps, but not Airmail. Dead as a duck in the ditch! No stars... no purchase!!!