Hak.5, the excellent video podcast/Internet television show, normally covers hacking with Windows, Linux, and occasionally Macs. I contacted the good people over at Hak.5 to see if they would consider doing more Mac-based segments and found out that they are going to dive into more Mac open source stuff soon.
What kind of stuff could Hak.5 cover? Take a look at OpenSourceMac.org; they have a bunch of Mac open source programs available for download.
If you can’t wait for Hak.5 to cover Macs, there’s always TWiT’s MacBreak and ScreenCastsOnline. On a related note, if you’re in the mood for Mac-news you can’t go wrong with Adam Christianson’s terrific MacCast. Feel free to post your favorite Mac-based podcasts in the comments.