What is diskarbitrationd on a Mac? Disk mounting
What the diskarbitrationd process does in macOS, why it can use CPU or memory, and whether you can stop it.
What is diskarbitrationd?
diskarbitrationd mounts and unmounts disks and volumes: external drives, disk images and the internal volumes.
Why is diskarbitrationd using CPU or memory?
It is busy when drives are connected, ejected or failing to mount repeatedly.
Can I stop diskarbitrationd?
No. If it stays busy, a drive may be failing to mount; check Disk Utility.
External drive not showing up covers mounting problems.
Common questions
Is diskarbitrationd safe on a Mac?
Yes. It is part of macOS. diskarbitrationd mounts and unmounts disks and volumes: external drives, disk images and the internal volumes..
Can I quit diskarbitrationd?
No.