.Dd May 5, 2017 .Dt SECURITY-CHECKSYSTEM 1 .Os .Sh NAME .Nm security-checksystem .Nd validate system keychain .Sh SYNOPSIS .Nm security-checksystem .Sh DESCRIPTION .Nm Checks to see if the System.keychain is intact and working. If it isn't, replaces it with a new, empty, working one. .Sh SEE ALSO .Xr security 1