Transmission is free bit-torrent client for Linux,Mac and Windows which is being widely used. But sadly it dosen’t posses the schedule feature present in BitTorrent.
OSX is a great operating system from apple, it is great if you have mac but if you don’t you need not worry follow up a simple hackintosh guide from (http://www.hackintosh-india.com).
Steps to schedule torrents in Transmission on OSX ,
Self explanatory video,
1. Open Automator, create launch application and include Transmission. Save as application on the Desktop.
2. Open iCal, create an new event and create open file for alarm . Set time.
3. Test the settings and you are good to go.
If you got any queries share with me in comments.