Yes, X10 security cameras can play nice with the Mac,
but you may need a separate Mac compatible video input device.
As an example. The wireless X-10 cameras transmits video to a receiver which outputs analog video. However the X-10 USB converter does not work on a Mac. In place of the X10 USB converter, use a USB converter such as XLR8's InterView, a PCI video input card, or a FireWire/DV video converter. You may want to do a little research beforehand about these solutions before making any decisions.
X10 does not make any software for Mac.Here are 2 companies that I know of that make security camera software for the Mac.
EvoCam http://www.evological.com/evocam.html&
Security Spy http://www.bensoftware.com/ss/I would suggest that you visit their websites for more info.
If you can't find what you need to know on their web sites, then E-mail them.
I'm sure that they would be happy to answer your questions.
If you need Control software for Mac, here are a few.
http://www.alwaysthinking.com/thinkingHome.htmlwww.perceptiveautomation.com/ www.shed.com/http://misterhouse.sourceforge.net/http://heyu.tanj.com/heyu/index.htmlI hope this answer was helpful. If so, clicking on the "Helpful Post" on the left would be a nice gesture.