<P> Kernel extensions ("kexts") will require explicit approval by the user before being able to run . </P> <P> The Low Battery notification and its icon were replaced by a flatter modern look . </P> <P> The time service ntpd was replaced with timed for the time synchronisation . </P> <P> The FTP and telnet command line programs were removed . </P>

What is the size of mac os high sierra