Mac Kung Fu:

Open a Terminal window, which you’ll find in the Utilities folder within the Applications list, and paste in the following, typing your login password when prompted:

sudo sysctl debug.lowpri_throttle_enabled=0

This command prevents Time Machine’s backup process assuming a low CPU priority, allowing backups to complete insanely quickly.

In my opinion, this should be an exposed setting. Meaning, you should be able to flip a switch in the Time Machine preference pane that says, “Go ahead and run Time Machine in high priority mode so it gets done faster. I understand that my other stuff may suffer a bit performance-wise, run a bit slower.”

Read the whole post to learn how to make this command more permanent (otherwise you have to type it in again after each reboot).

Bookmark this and pass it along.