What are the improvements in Mail in Mavericks? I'm happy with a link to a document, if such exists. I have to decide if I am going to pay up for 20GB of iCloud space and the thing holding me back is the integration difficulties between Mail and Gmail. I want to be able to route all my mail through Mail by forwarding all my Gmail to my iCloud address - and then be able to send replies from the appropriate gmail email address. And I don't want two copies of everything in my inbox.