On Sabre's site they list browser compatibility, here is what it says about Safari
Safari (for Mac) - Cannot 'inquire' on pairings directly from Master Schedule page (pairing is not displayed correctly), minor display issues on Master Schedule.
I have a Blackberry and I can look at the schedule using Opera Mini, but I can't use the inquire function and a couple of other things. I would think you'd have a similar experience. It's good for a general look at schedules.