i've tried the /targetenemy line in my macros as well, even tried the ones with multiple /targetenemy lines before the /cast spell and still won't work. hell, won't even target an enemy for my slaves before going into combat. what I'm tryin to do here is use a mass /cast Hunter's Mark for my hunter party. that way I can run into or near a mob or in battlegrounds and toss up marks on a crowd then start firing away. only way i can get this to work is by targeting something with main, then hitting the /assist key, have them target the enemy, but even then, they all cast HM on that one enemy instead of all the enemies in the mob. I run 4 accounts, so would I use the following macros?

main > no macro, straight up /cast Hunter's Mark

slave 1
/targetenemy 1
/cast Hunter's Mark

slave 2
/targetenemy 2
/cast Hunter's Mark

slave 3
/targetenemy 3
/cast Hunter's Mark

or how would the numbers go in this setup? how would it go if i have my priest leading my three hunter slaves?

this is a very useful macro, but it seems it won't work for everyone. I'll test this out, but as of now, i don't see this working either.