mach - display the processor type of the current host
The mach command displays the processor-type of the current host.
See attributes(5) for descriptions of the following attributes:
mach and uname –p return equivalent values; therefore, Independent Software Vendors (ISV) and others who need to ascertain processor type are encouraged to use uname with the –p option instead of the mach command. The mach command is provided for compatibility with previous releases, but generally its use is discouraged.