Hello Developer
I'm running 10.5.1 on an Intel iMac. Downloaded and installed Onyx - seemed to go okay. (Was a little nervous about having to run the installer, but since it seems to be just for an application that's dumped into /Applications - as opposed to any additional "hidden" stuff - I decided to proceed.)
I subsequently launched the application ... and it hung. The toolbar from the top of the Onyx window was drawn, but not the lower, main part of the window. Additionally, "Finder" effectively remained the foreground application - the menu never changed to show Onyx's menu information. I had to Force Quit Onyx from the Dock. This repeated several times, so ended up trashing the app for now. Will watch out for the next release.
OnyX
Maintenance, optimization and system personalization tool.
Version: 2.1.1