UNAME(1)                    General Commands Manual                   UNAME(1)

NAME
     uname – display information about the system

SYNOPSIS
     uname [-amnoprsv]

DESCRIPTION
     The uname command writes the name of the operating system implementation
     to standard output.  When options are specified, strings representing one
     or more system characteristics are written to standard output.

     The options are as follows:

     -a      Behave as though the options -m, -n, -r, -s, and -v were
             specified.

     -m      Write the type of the current hardware platform to standard
             output.  (make(1) uses it to set the MACHINE variable.)

     -n      Write the name of the system to standard output.

     -o      This is a synonym for the -s option, for compatibility with other
             systems.

     -p      Write the type of the machine processor architecture to standard
             output.  (make(1) uses it to set the MACHINE_ARCH variable.)

     -r      Write the current release level of the operating system to
             standard output.

     -s      Write the name of the operating system implementation to standard
             output.

     -v      Write the version level of this release of the operating system
             to standard output.

     If the -a flag is specified, or multiple flags are specified, all output
     is written on a single line, separated by spaces.

ENVIRONMENT
     An environment variable composed of the string UNAME_ followed by any
     flag to the uname utility (except for -a) will allow the corresponding
     data to be set to the contents of the environment variable.

     The -m, -n, -r, -s, and -v variables additionally have long aliases that
     have historically been honored on MacOS, “UNAME_MACHINE”,
     “UNAME_NODENAME”, “UNAME_RELEASE”, “UNAME_SYSNAME”, and “UNAME_VERSION”
     respectively.  These names have a higher priority than their shorter
     counterparts described in the previous paragraph.

     See uname(3) for more information.

EXIT STATUS
     The uname utility exits 0 on success, and >0 if an error occurs.

EXAMPLES
     The hardware platform (-m) can be different from the machine's processor
     architecture (-p), e.g., on 64-bit PowerPC, -m would return powerpc and
     -p would return powerpc64.

SEE ALSO
     hostname(1), machine(1), sw_vers(1), sysctl(3), uname(3), sysctl(8)

STANDARDS
     The uname command is expected to conform to the IEEE Std 1003.2
     (“POSIX.2”) specification.

HISTORY
     The uname command appeared in PWB UNIX 1.0, however 4.4BSD was the first
     Berkeley release with the uname command.

     The -K and -U extension flags appeared in FreeBSD 10.0.  The -b extension
     flag appeared in FreeBSD 13.0.

macOS 15.2                     November 13, 2020                    macOS 15.2