help me plz 2.1.2 Resolving Dependencies for osx pcl

edit

in ros hydro osx homebrew

i'm working on 2.1.2 Resolving Dependencies and take command to terminal

$ rosdep install --from-paths src --ignore-src --rosdistro hydro -y

but finally i can't pass it to 2.1.3 because my terminal show error

[
Error: No available formula for pcl_msgs  
Please tap it and then try again: brew tap ros/hydro  
Error: No available formula for flann   
executing command [brew install ros/hydro/pcl_msgs]   
Error: No available formula for pcl_msgs  
Please tap it and then try again: brew tap ros/hydro    
ERROR: the following rosdeps failed to install  
homebrew: command [brew install ros/hydro/pcl_msgs] failed ]

after i command

$ brew install ros/hydro/pcl_msgs

but terminal show this

Error: No available formula for pcl_msgs 
Please tap it and then try again: brew tap ros/hydro

after than I command

$ brew tap ros/hydro

terminal show this

Warning: Already tapped!

Could you help me solve this problem,please I'm really stuck thank you sorry for bad English