Nox has been made obsolete by OS 10.3.4, as Apple has fixed the files that they forgot. The download is not available because I have taken NOx offline. If it is run in 10.3.4, it will report that startup acceleration is off, if you try to disable it, it permanently removes an important file that it cannot replace. Thank you for not using NOx, as I have now permanently disabled startup acceleration on my computer.