Currently both /bug and /feedback do not work on LIVE or PTS for the MAC operating system. This really needs to be fixed. If you want bug reports or feedback from the MAC user base in this game this needs to be fixed.
@Glierhuin posted an excellent link, thank you so much! We're still receiving your /feedback and /bug reports on the mac, however the internal browser is currently experiencing issues with OSX Yosemite. We're currently working towards resolving this issue, though we do not have an ETA.