mkfile

Create one or more empty files of any size. More information: https://ss64.com/osx/mkfile.html.

• Create an empty file of 15 kilobytes:

mkfile -n 15k filename

• Create a file of a given size and unit (bytes, KB, MB, GB):

mkfile -n sizeb|k|m|g filename

• Create two files of 4 megabytes each:

mkfile -n 4m first_filename second_filename