I’ll introduce the steps to install the ionice command so you can use it on Mac.

curl -O https://raw.github.com/elmarb/ionice/master/ionice.c
gcc ionice.c -o ionice
sudo install -o root -g wheel ionice  /usr/local/bin/

Using the ionice command, you can copy large numbers of files with low load.

• How to handle large/huge file operations with low load - How Old Are You?

Linux has many convenient commands and is quite deep.

Reference Information

• ionice on Mac – Matsubo x Web

That’s all from the Gemba.