Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Google Acquires iOS & Mac Mail Client Sparrow
We’re excited to announce that Sparrow has been acquired by Google!
We care a lot about how people communicate, and we did our best to provide you with the most intuitive and pleasurable mailing experience.
Now we’re joining the Gmail team to accomplish a bigger vision — one that we think we can better achieve with Google.
We’d like to extend a special thanks to all of our users who have supported us, advised us, given us priceless feedback and allowed us to build a better mail application. While we’ll be working on new things at Google, we will continue to make Sparrow available and provide support for our users.
We had an amazing ride and can’t thank you enough.
Full speed ahead!