Some mac's have no Player.log

Hello,

Normally, the log for our game on a user's mac can be found at

~/Library/Logs/Unity/Player.log

However, on some macs, several models and different osx versions, there is no log to be seen.

I guess this is some setting on the mac but I have no idea what it could be, someone here knows why unity games can't write log files on some macs?

Thanks,
Alex Vanden Abeele