Metronome issues

Hello

I'm running MainStage 3.0.4 on 2 MacBooks.

One with OSX 10.8.5 and the other on OSX 10.10.1

The 2 MacBooks are connected to the same wifi network and connected to the same midi network

MainStage has found the midi network on the to computers.

I have already set the macbook n°1 to change patch, metronome, start and stop on the 2 MacBooks at the same time, but the 2 metronome are not sync

there is a very small gap between the to MacBooks

Any ideas to fix it ?

Thanks

Sorry for my english, this is not my langage