1st i tried the latest beta on my MacMini with macOS 10.12 Sierra and it crashes when i tried to patch one fixture.
2nd i tried it on a MacBook Pro with OS X 10.11 with the same negative result.
The beta crashes also if i tried to load a file created with the official version from August 2016.
3rd an installation of the latest beta on a Windows 10 64bit-PC works without any problem. It was also no problem to load the file created with the official version

One nice to have feature should be the option to change the font-size of Daslight 4. The Mac Version ist on lowest level of readable, Windows 10 with HD-resulotion is for me under the lowest level.
Regards,
Heiko