Send us a crashlog
If MacFamilyTree ever crashes on your system, what we need to find the problem is pretty detailed and technical information. Mac OS X will ask you if you want to send a report after a crash. However, this report isn't sent to us but to Apple so their engineers can check if a crash was caused by an error in their own software.
To help us find problems on our side, please send us a crashlog as demonstrated in this video. Then describe what you were doing just before MacFamilyTree crashed.