The easiest way, as George mentioned, would be just to give them the target files. However, I suspect you've done some fades, edits, cue sequences, etc. that you'd like to make into files for them so that they behave similarly to what you've programmed in Qlab. If that's the case, what I've found works the best is using a program that captures audio from other programs - I find it a lot easier than using Sounflower, but the end result is similar.
The two I've used most extensively are Wire Tap Studio, and Audio Hijack Pro. However, I've recently discovered another program by Rogue Amoeba (they make Audio Hijack Pro) called Piezo, that is a much simpler and stripped down version of AHP. You have to start the Piezo first, select which program you wish to record from (in this case, Qlab), then Qlab will open, and Piezo will capture any audio that Qlab plays until you close Piezo. You can select different file types, but Piezo doesn't offer any lossless types, unfortunately - that's where AHP comes in. Then cue through your sequence and you'll have audio files that mimic what you've programmed.
Both Piezo and AHP have demo versions that might suffice for what you're trying to do. Good luck!
Mark