The ShutDown Manager is an internal procedure, locked inside the debugger, which unmounts all volumes, enabling a restart. The ShutDown Manager's accessibility is unverified (by this site) and it could or could not be possible that this procedure may fail with newer versions of the Mac OS. It does not work at all under Mac OS X. The ShutDown Manager unmounts all volumes so that a restart does not take additional time to reconstruct the volume directories. This, in turn, enables a restart. To use ShutDown Manager: