How Migrate Database Mac to Second drive internal???

Hi, 

Are you talking about the rekordbox database that contains the meta data, hotcues etc as stored in the user/library or are you talking about your track collection (the mp3 tracks)?  

For good measures, replacing your opticall (dvd) drive with a harddrive doesnt matter for the MacOS. It's just an extra harddisk volume and mounted during start up (since it's a harddrive). The user folder (containing documents, music, library etc) can only exist on one volume and not being distributed across volumes. However the entire user folder can be on a different volume then the startup disk (or even a different disk from the disk holding MacOS).

my workflow is basically what you want:

All my music (for iTunes, djay, Traktor, Rekordbox, Mixed in Key and Live) is on a mounted volume on a server. (this would be your 2nd hard disk). This way the tracks I access are the same for all programs i use, regardless of the computer i'm working on. (you can mimic this situation by having your collection on an external usb drive).

I have one "master" iTunes list that I distribute among the other computers I use. (compress the itunes folder in the /user/music folder after emptying the cache of that folder first).

Then I use the distributed itunes lists as blue print for the playlists in all other programs I use including rekordbox. I

I use iTunes as collection manager, not because it's the best but just because it's got gateways to all other programs out there. And it's Apple scriptable so I can write all kind of tag changers and duplicate track finders etc.

I use Mixed in Key for the basic camelot key detection.

I use Traktor for setting cues, loops and beatgrids because I started with it once and it's still good enough for that purpose.

Finally I use Rekordbox as most of us for gig preperation on usb.

I use algoriddim's djay Pro on iOS as an ad hoc party system.

I wrote a utility to convert my traktor cues to both djay and Rekordbox you can watch the demo at

https://youtu.be/_dJkG2u5yww

And because Traktor sometimes loses the keys found by MIK I wrote another utility to batch fix lost keys (and reformat the comment field in the process so its sortable and usefull on) that one is demoed at:

https://youtu.be/aka5eOd-Wq0

--another option (i used to use it but its not as rock solid as the option above) If you are a bit more adventurous. You can create a user (MacOS user that is) whose complete "home" folder is stored externally. goto system preferences-> create a new user -> click on the user -> unlock it -> RIGHT click on the user you'll get the option to select "Advanced" options) there you can set the "home folder. That way you'll have the original settings etc all ready to go without having to copy them.

Draw back is that if you run into problems (damaged files etc) its not as easy to fix as the traveling zip solution, a USB drive is a slower then an internal SSD and if you don't have your external drive at hand the user you created will be unusable. Preferably the external home folder is on it's own partition because the access privileges should be respected for that volume. So you divide your big external harddrive in 2 partitions, 1 big one for the tracks and one smaller one for the home folder. (on my 2Tb's it used to be 400Gb user, 1.6Tb tracks) That way you can back up one without backing up the other retaining access privileges.