Solution to another Mac Pro sleep failure
I recently developed problems with my 2008 Mac Pro (3,1) failing to enter sleep modes. Attached displays no longer went to sleep, and hard disks would not spin down. After many hours of investigating this, I found that the Nalpeiron Protec6 software was the culprit. Never heard of it you say? Well I had not either. It is installed surreptitiously by a variety of software vendors as an anti-piracy mechanism. In my case it was installed by Nik Software's Viveza 2 installer; currently this installer does not tell you that they are installing another 3rd party application.
The Nalpeiron Protec6 software is installed in /Library/StartupItems/Protec6 folder. You can tell if the daemon software is running by typing ps ax | grep 'nalpeiron' in Terminal.app.
Renaming, changing load order, etc., didn't help. Viveza 2 won't run without it. So for now, goodbye Viveza and goodbye Protec6. Nuking the Protec6 folder and a quick restart seems to be all that's needed to rid your system of this garbage. Hope this is helpful
The Nalpeiron Protec6 software is installed in /Library/StartupItems/Protec6 folder. You can tell if the daemon software is running by typing ps ax | grep 'nalpeiron' in Terminal.app.
Renaming, changing load order, etc., didn't help. Viveza 2 won't run without it. So for now, goodbye Viveza and goodbye Protec6. Nuking the Protec6 folder and a quick restart seems to be all that's needed to rid your system of this garbage. Hope this is helpful
Mac Pro 2008 Dual Quad Core, Mac OS X (10.6.4)