Originally Posted by
Blindlad
Some reasoning to why it sometimes doesn't work, regardless of having a proper targeting macro:
The boss is ultimately split into 2 equal sides - left and right, and there is almost a "LoS blocker" line between the two straight in the middle. You can never be standing in the middle, you are always physically located either on the left or right. And while that blocker does not prevent you from dpsing things on the other side, it does prevent you targeting things on the other side via macros.
So if you are opening up the left tendon - your macro with the creature name (not boss2) will work flawlessly if you are also standing on the left side and will do jack if you are standing on the right side.