If you can’t find the GW2 under ~/Library/Application Support/ you might have to enable hidden files/folders. Keep in mind GW2 is under ~/Library/Application Support/ and not /Library/Application Support/. To enable hidden files/directories just open up terminal and enter the following command..
defaults write com.apple.Finder AppleShowAllFiles YES
Then restart Finder.
To disable hidden files just do..
defaults write com.apple.Finder AppleShowAllFiles NO
Hope this helps.
This command, for what ever reason is not working in my Terminal for Snow Leopard.
What did work to show hidden files was
defaults write com.apple.Finder AppleShowAllFiles TRUE
(enter, then type and enter)
killall finder
To reverse this:
defaults write com.apple.Finder AppleShowAllFiles FALSE
(enter, then type and enter)
killall finder
That being said, inside Applications Support, it still did not have the GuildWars 2 folder, hidden deactivated or not.
EDIT: I did find it, I was making a noob mistake of looking under Macintosh HD then library, app support instead of my Macbook Pro’s Name then library, app support.