Navigate to Finder (your desktop).
Click the ‘Go’ menu in the menubar.
Hold the Option key with the ‘Go’ menu open.
Click ‘Library’.
Go to the Application Support folder.
Go to the Guild Wars 2 folder.
Delete the Guild Wars 2 folder.
Please note that if you’ve installed the ‘beta client config tweaks’ from another thread in this forum you will have to do so again if you delete this folder (unless you save the config file).
I’d like to request that this thread be stickied since this seems to be such a common problem.
Perfectly worked for me! Macbook Pro 15’’ Retina, mid 2012.