Black screen with sound Mac
Try this:
you can try to delete the contents of the gw2 data folder, it’s a pain to get to the right one: this step is a general fix for many tp and graphics issues, even without the previous steps however, it will lose all saved log in/password and in-game settings.
To access this:
1 Click on the “Finder” icon located in your dock or the desktop of your computer to make “Finder” the active program in the finder menu bar.
2 Hold down the “Option” key on your keyboard while clicking “Go” in the finder menu bar. A drop-down will appear.
3 While still holding down the “Option” key, click on “Library” in the “Go” drop-down.
4 Once in the Library folder click on Application Support > Guild Wars 2
5 Move the entire Guild Wars 2 folder to the trash and then empty the trash.
The next time you launch Guild Wars 2 it will recreate the recently deleted folder.
Even if you’ve already tried that, try it again.
When you loaded the game on your new iMac did you copy the files across from your MBP, or did you redownload the game?