A Mac OS X utility for setting the power management (APM) level on ATA hard drives.
It can be used to eliminate "chirping" or "clicking when idle" noises in some HDDs.
OS X 10.5 or higher.
ATA/SATA hard disk with APM support.
Does not work with external USB or Firewire drives.
Further information can be found in the usage guide.
New! (Aug 25, 2012) version 1.2.