Is there a way to find out if someone downloaded files from my Mac?

Question

Problem: I was in a big meeting and logged in to a wlan with everyone else. Everyone had a Mac. Like 50 people or so. After the meeting I saw that in my sharing settings, my whole Mac HD was completely shared for everyone. Now, is there some logfile that could show me if someone did download private stuff from my Mac during that meeting?

Answer 1

AFP (file sharing) access should be logged in:

/Library/Logs/AppleFileService/AppleFileServiceAccess.log

SSH based logins and general security information goes into:

/var/log/secure.log