I have 3 Mailbox for Mac betacoins but nobody to give them to

You can download Mailbox for Mac (beta) here: http://www.mailboxapp.com/#download

have at them:

https://i.imgur.com/xNXjRXr.gif https://i.imgur.com/quu1POA.gif https://i.imgur.com/dqVbW0K.gif