Have you tried to use the latency/delay tool?

(to be found in " Tools "_" Midi Devices ..."_" Synchronize rhythms ")

Yes I do. With a delay 5ms, image and sound are synchronized. But that's not the problem. Perhaps should you try the software on a trial version of fusion to see what happens ?

tajika wrote:Hello there!
I tried earmaster on vmware fusion on mac. The software runs not too bad, however rhythm exercises are not usable.

With VMware Fusion, the rhythm exercises have latency. But if you disable the metronome (it just play once), it seems that the latency disappear.