Sadly there are only 2 capture programs for the mac at this moment and neither of which are free.
It's pretty rough but I suppose I could tell you a bit about the 2.
Both programs allow you to set time schedules and monitor although HDPVRCapture utilizes VLC player to monitor recording and EyeTV is a stand alone program. I have used both and with my needs I would rather use EyeTV but other people prefer HDPVRCap because it lets you choose whether or not you want to monitor the video being recorded. If you have anymore questions feel free to ask