Hi Fuidawg,
Firstly, it is good to know that if you have analyzed your files using ITCH all your information including cue points, bpms etc are now tagged to the files and will show up within ITCH on any other computer you choose to use in the future.
If you follow these steps carefully it should help you out with the transfer;
1) Move you music files from your PC hard drive to your Mac hard drive.
2) Find your ScratchLIVE folder in the My Music folder on your PC. This contains all your library and crate information. Copy this to your Mac and make sure you put it in the Music folder (all Macs by default have a Music folder, you will see it in the left hand column when you open a Finder window)
3) Open Scratch Live on your Mac, you should now see your library and crates. You now need to tell Scratch Live where your music files now are on your new Mac.
4) Go to the Files window and click the Rescan ID3 Tags button. Scratch Live will now start looking for your files. As they have moved to a new computer they will not be found and will be displayed red.
5) Stay in the Files menu and browse to where your music files are now located. Click and drag the folder onto the Relocate Lost Files button. Scratch Live will now find your files and they will turn white again.
6) You should now be up and running again
If you would prefer, there is a pretty good video tutorial here:
youtu.be
Best of luck, and if you have any further issues post back here :D
