systemkeychain [-v] [-f] -C [
password] systemkeychain [-v] -t systemkeychain [-v] [-c] [-k
Creates and manages the system Keychain, /Library/Keychains/System.keychain. (It also creates /var/db/SystemKey, which presumably contains a randomly generated Keychain password in encrypted form.) This Keychain is used by system processes that run as root, such as daemons and boot processes, and is created automatically by the SecurityServer startup item.
Create the destination Keychain if it doesn't already exist.
Create a new system Keychain, unless one already exists. The Keychain password can be specified with an optional argument.
Force an overwrite of an existing system Keychain when creating a new one.
Instead of adding a key to the system Keychain, add it to the specified destination Keychain.
Add a key to the system Keychain that can be used to unlock the specified Keychain.
Unlock the system Keychain.
Enable verbose output.