Step 1. While preparing to the show
The process is exactly the same as Windows BBManager, you just use a Mac Beta version from this thread.
Open BBManager.
(optional, should be done only once) Import the project from pedal via Import - Export > Import Project from Pedal.
Select a folder (or create a new one via Organize > New Folder).
Import a song (SNG) to there via Import - Export > Import Song.
Export the project to pedal via Import - Export > Export Project to Pedal.
Step 2. While on the show (playing live)
All the songs should already be in necessary folders as currently there is no way to drag songs between folders without BBManager.
Somehow I managed to get my own Drumset and Song onto the SD card via my card reader by first saving as project.
If I try to Import the project from pedal via Import - Export > Import Project from Pedal I only see 4 folders DRUMSET, EFFECTS, PARAMS and SONGS on the SD card.
All folders except SONGS seems empty.
The SONGS folder have 23 other folders that also seems empty so I really cant see what I am supposed to import since there are no file to choose ?
Every time I start BB Manager now, there are no Songs at all !
Does your pedal still have songs?
If that is the case, simply Import Project from Pedal (select the SD card location). Your BBManager will have songs again.
If not, you can download the default content from the download page, extract it and then Import Project from Pedal and select the folder where you have unpacked the archive to.