What is CoreSimulatorService on Mac?
By Junaid, maker of Taskglass · Last reviewed
Manages Xcode's simulated devices and their system images in the background.
CoreSimulatorService manages simulated devices for Xcode and the Simulator app: creating, booting and shutting them down. simdiskimaged mounts the simulator runtime disk images. They can stay running after you close Xcode, which is normal.
- Category
- Developer tools
- Made by
- Apple
- Safe to quit:
- With care
Shown in Activity Monitor as com.apple.CoreSimulator.CoreSimulatorService, simdiskimaged
Why is CoreSimulatorService using so much CPU or memory?
- Booting or creating simulated devices
- Installing or updating simulator runtimes
- Xcode querying devices at launch
What to do
- 1Let simulator runtime downloads finish
- 2Delete simulator runtimes you don't need in Xcode Settings > Components
- 3Restart your Mac if it stays busy
Safe to quit? With care.
Running simulators stop; it restarts when Xcode needs it.
Related processes
Part of the Taskglass Process Library