(These haven't been fully tested yet, please let me know if you find issues)
So you're a family of 6 and you each have a login on the same mac:
- Dad
- Mom
- Son1
- Son2
- Daughter1
First you need to decide which user will "own" the master library. So if we select "Dad", then Dad should log into the mac.
- Login to the user whose library you'll be working on
- Launch iTunes
- Select iTunes -> Preferences (Or hit Splat-,)
- Click on the Advanced tab (Make a note of the "iTunes Media folder location")
- Select "Keep iTunes Media folder organized"
- Select "Copy files to iTunes Media folder when adding to library"
- Click "OK" and close the preferences folder
- Select File->Library->Organize Library (This will copy all files into the directory specified in the advanced user preferences tab as the base directory, and organize them according to the wisdom of iTunes)
- At this point all Dad's music files should be organized.
- Repeat 1->7 for the rest of the users (Mom, Son1, Son2, Daughter1)
- Make a note of the location of the iTunes library for each user when you're in the advanced tab.
- Now log back into the Dad's account
- Start iTunes
- Click on File->Add to Library...
- Select the directory for the user's library you're consolidating into this library.
- Click OK
- Repeat 12->16 for the rest of the users you're consolidating into this library
And.. You're done.
One thing this won't do is migrate playlists into the master account.