E-mailing Garage Band Projects
How can I e-mail Garage Band projects to someone else to work on? I have GB 10.0.3 and so does my son. When I e-mail him a project, it cannot be opened on his MacBook Pro. We both have the same computers and version of Garage Band. I tried attaching it to an e-mail the regular way and also tried using the "Share" menu on GB to create an e-mail.
GarageBand 10, OS X Yosemite (10.10)