Quote Originally Posted by worldofneil View Post
Cure (and Physick etc) will always cast on yourself if they cannot cast on the target in question. This has always been the case since at least 2.0 (possibly earlier than that, but I can't remember). If you have an enemy targetted or something that is valid to receive the cure (someone who just died or just raised for example), the cure will still cast, but will always land on yourself.
That's true if you have the skill itself directly on your hotbar and use that, and I'm pretty sure it's also true if you have just /ac "Cure" in a macro. In those cases, it will try casting on your target, but will cast on yourself if that's not valid. But once you place the target specifier in the macro line, like <t>, <tt>, <mo> or whatever, then that's the only target that that line of the macro will use. Target selection like this is one of the most popular and widespread uses for macros.