I installed the demo version of Color Eyes Pro v1.52 on my 17" unibody MacBook Pro running Mac OS 10.5.7. At the end of the installation, I received the following error:
The error text reads:
> **System extension cannot be used**
> The system extension "/System/Library/Extensions/MonitorControl_drv.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.
It doesn't seem to be a common problem because a Google search for "MonitorControl_drv.kext" currently returns exactly one result (so rare!).
Color Eyes Pro seems to be working just fine on the MacBook Pro, and installing the software package on my Mac Pro proceeded smoothly without any errors.