TLDR
Enter a command. For example: whatis, nettop, imgcat, sw_vers.

securityd

 
This manages security contexts and cryptographic operations. Works with secd for keychain access. It should not be invoked manually. More information: https://www.unix.com/man-page/osx/1/securityd/.
 
  • Start the daemon:
     
    securityd

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