MACVAULT  For those not happy with this, you might check out Intego. I've been running it for 1 1/2 years. Great support, works very well on Leopard. It is a bit more expensive, but overall I have no complaints with it. I'm running the older basic v1.8x version (not server) and have over 20 devices that work flawlessly. My devices are all Insteon, so I cannot attest to X-10 support, but I've heard it's just as good.  (Version 2.0b17)

PDMARSH  I've been using Thinking Home for years since I like automating lights around my house, but this product has never been updated to work properly with a USB Serial Adapter, like the Keyspan USA-28, with MacOS X. In the past it has generally worked, but I always winced when starting the application because more often than not it would not see the X-10 Interface (a CM-11 or IBM Home Director) plugged in six inches down the line.

Finally, today I replaced my old G4 iMac (lampshade) with a newer G5 iMac and Thinking Home refuses to see the active serial ports installed via the Keyspan Serial Adapter software. I've visited the Thinking Home site, but all they do is blame MacOS X and make a suggestion to unselect the active ports in the Network Port Configurations panel.

So, in a nutshell, this worked pretty well with MacOS 9, but has been very problematic with MacOS X.

I've been transitioning to Indigo, talking to real USB devices with assigned addresses, and it works much more reliably, and recommend it to others thinking about home automation.

I no longer recommend Thinking Home software.  (Version 1.1.7)

JIMW  This used to be the Mac standard for X10 control and pretty much the only useable one available unless you wanted to keep your computer running all the time. However it has been literally years since an update was released and technology with X10 control and its children have advanced considerably, along with interface design. So this update is just too little and too late. According to the authors description no significant changes or feature additions have occurred. This release according to the description seems mostly to be a bug fix.

I have long since switched to Indigo. It has many more features, a more modern interface, and supports more interface controllers. Additionally new features and bug fixes are released every few months instead of every few years. Frankly I am surprised to see this update as everyone I spoke to about it, like myself, assumed it had been EOL'd. That impression is what caused me to try Indigo and ultimately purchase it.

Given the website and the support, in the way of improvements and updates, Thinking Home leaves me with the impression that it is the developers hobby rather than their avocation. Since I depend on X10 as part of my security system I want something that is actively in development, testing, and improvement. That product, at this point, does not seem to be Thinking Home.   (Version 1.1.7)