What Is hidd, and Why Is It Running on My Mac?

What is hidd? Hidd is an abbreviation of human interface device daemon. In simplest terms, it’s the process that allows your Mac’s mouse or trackpad and keyboard to work. It interprets keyboard commands, mouse movements, and trackpad gestures and passes the results to the relevant part of the OS.

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What Is hidd, and Why Is It Running on My Mac?

If high resource usage persists, the likely culprit is third party software. If you’ve recently installed drivers for a third party input device, or software that lets you do things like customize your key bindings, this could hypothetically be the issue. Try uninstalling this software, then see if that solves the issue.

The hidd process is not harmful, and is actually part of macOS itself. The cryptic name stands for Human Interface Device Daemon. This daemon interprets all of your mouse movements and keyboard taps, meaning it’s essential if you want to use your Mac. Other input devices, such as tablets for drawing and game controllers, are also managed by this daemon.

It’s rare, but occasionally Mac users report that hidd is using an excessive amount of CPU or Memory. In most cases simply restarting your computer will solve the issue. It’s also possible to kill hidd directly using Activity Monitor. You’ll briefly be unable to use your mouse and keyboard if you do that, but macOS will re-launch the daemon shortly after and everything should be back to normal.

If you’re trying figure out what’s keeping your Mac from sleeping, you’ll find hidd listed as a reason why. There’s a good reason for this: hidd handles mouse and keyboard input, and you used your mouse and/or keyboard to run the command. You don’t want your computer to fall asleep while you’re using it, so hidd prevents your Mac from falling asleep so long as you’re typing or moving your mouse.

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