Use Mail to share songs from GarageBand on Mac
Mail lets you quickly send songs to anyone as an attachment.
Note: To send larger attachments, you can use Mail Drop.
Share a song via Mail
In GarageBand on Mac, choose Share > Mail.
In the Mail dialog, do the following:
Select Project, if you want to share a project that recipients can open and edit it in GarageBand on another Mac.
All audio-related settings are unavailable.
Select Song, if you want to share an audio file mixdown that recipients can open and play in the Music app, or in any app that supports .m4a, .aif, or .wav files.
You can edit the following settings:
Enter a new name in the Title field.
Choose an audio format from the Quality pop-up menu.
Choose whether to export the entire project, or only part of it based on the cycle area or the length of selected regions.
Click Share.
If you’ve set up a Mail account, a new email is created with the project or song added as an attachment. With Mail Drop turned on, the project or song will be delivered as an attachment, even if the size exceeds the maximum allowed size for attachments.