Hi dragonsi,

I don't know if you ever figured it out but I had a similar problem and wanted to move my macros from one computer to another. I found out, as ManekiKanji suggests, that the macros are indeed stored under the user profile and specifically in a single file.

You can copy the following file from one computer to the other and it worked great on my setup:

My Documents\My Games\FINAL FANTASY XIV\user\023681EC\mcr0.

After copying this file to the second computer and restarting FFXIV all my macros were available.

I hope it helps somebody out there.