Mailbox for Mac is no longer in a closed beta, but has finally reached open beta, meaning all users can download the app without waiting for an activation code.
— Mailbox (@Mailbox) October 13, 2014
Dropbox first previewed Mailbox for Mac back in April and later started sending out activation codes in mid-August. Currently, Mailbox for Mac only supports Gmail, Google Apps and iCloud account emails.
Earlier today, Mailbox for iOS was updated for the iPhone 6 and iPhone 6 Plus and also gained support for customized swipe actions.
Click here to download Mailbox for Mac beta. Let us know how you like it.