Recently I updated to the Snow Leopard, and even the process is very easy, as I pulled all my files from Time Machine backup, some applications and plugins are needed an update. In that same way, I updated my LCC from 2.6 to 3.1 because I love updates. What resulted as a big mistake. Mouse buttons were the same like before the update, but I couldn’t see my device in System Preferences.

Logitech is making very nice hardware, but they suck big time in making a software for it. Besides that, they need like a half a year after the OS update, to make a change, don’t know why is that so, maybe Mac people aren’t so interesting to Logitech dev team.
There are several solutions that Logitech and other angry users recommend. You need to almost hack their software to see if will work, nothing worked for me.
Something obviously is missing in the Installer, because you need to run it manually. I tried this like five times, nothing.
If you can work with your mouse, but you dont see your mouse, they recommend to run some app manually.
Copied from here
With Forum users help, we find out that some incidents theLCC Daemon did not start for unkown reason(s). (The LCC Daemon did not start or stopped issue has been escalated and it is now under investigation.)
Here is the workaround: >
Not worked for me, still with "No device..."
As I always save almost all Installers and versions, that way I had LCC 2.6 in my archive
My config was lost, but in 2min I configured it again. There was only one issue. And its related with Expose, if you’re using Expose (Show desktop or applications or whatever), you need to copy (not move), Expose.app from Utilities to Application folder. that way you have Expose working like a charm. I even have battery status. So far I didn’t found any issue even the LCC is running in 32-bit version


So, you need to use your 5 versions old plugin to run your mouse. Because the latest is not working. Hope that some of this solutions worked for you.
Reference links: Google, Logitech, Tuaw, TechPatio.
Logitech control center 2.6 download. There should be a list of all versions on Logitech site, but, only new one is available.
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