# \#simulator **URL:** https://discuss.circleci.com/tag/simulator/143.md [Latest](https://discuss.circleci.com/latest.md) · [Categories](https://discuss.circleci.com/categories.md) · [Tags](https://discuss.circleci.com/tags.md) --- ## [Simulator Device Failed to Launch — SBMainWorkspace RequestDenied on CircleCI, Works Locally](https://discuss.circleci.com/t/simulator-device-failed-to-launch-sbmainworkspace-requestdenied-on-circleci-works-locally/54165)
**Author:** [@KaushalZerion](https://discuss.circleci.com/u/KaushalZerion)\ **Replies:** 4\ **Last updated:** [October 20, 2025, 1:07pm UTC](https://discuss.circleci.com/t/simulator-device-failed-to-launch-sbmainworkspace-requestdenied-on-circleci-works-locally/54165 "2025-10-20T13:07:06Z")
Hi @circleci team and community, I am consistently running into Simulator device failed to launch errors when running my iOS unit and UI tests as part of my Fastlane lane on CircleCI. The message is: Simulator device … --- ## [Simulators missing from macOS executors?](https://discuss.circleci.com/t/simulators-missing-from-macos-executors/52437)
**Author:** [@benlaverriere](https://discuss.circleci.com/u/benlaverriere)\ **Replies:** 16\ **Last updated:** [January 23, 2025, 4:53pm UTC](https://discuss.circleci.com/t/simulators-missing-from-macos-executors/52437 "2025-01-23T16:53:35Z")
Curious if anyone else is seeing this today. On a few different branches, xcodebuild commands are failing because the only available simulators are the “Any”/placeholder ones. When invoking xcodebuild directly with a pl… --- ## [Custom test schema location is not respected on CI run](https://discuss.circleci.com/t/custom-test-schema-location-is-not-respected-on-ci-run/38275)
**Author:** [@Bohdan](https://discuss.circleci.com/u/Bohdan)\ **Replies:** 3\ **Last updated:** [January 20, 2023, 8:01pm UTC](https://discuss.circleci.com/t/custom-test-schema-location-is-not-respected-on-ci-run/38275 "2023-01-20T20:01:29Z")
Hi, I have an issue with setting geo data for iOS simulator on CircleCI. Environment: XCode: 12.1.0 (specified in .yaml file) Simulator: iPhone 11 Pro, OS 14.1 My task is to set different location for simulator befo… --- ## [macOS executor: iOS Simulator OutOfMemory Errors — Flaky Tests](https://discuss.circleci.com/t/macos-executor-ios-simulator-outofmemory-errors-flaky-tests/43697)
**Author:** [@BriancCordanYoung](https://discuss.circleci.com/u/BriancCordanYoung)\ **Replies:** 0\ **Last updated:** [April 14, 2022, 11:15pm UTC](https://discuss.circleci.com/t/macos-executor-ios-simulator-outofmemory-errors-flaky-tests/43697 "2022-04-14T23:15:03Z")
Over the last 7 to 10 days I have been seeing iOS Simulator tests marked as flaky failing my test runs. These are tests of code that have been stable throughout this period and are truly flaky in that restarting from fa… --- ## [Fastlane concurrent simulators cause connection abort](https://discuss.circleci.com/t/fastlane-concurrent-simulators-cause-connection-abort/26856)
**Author:** [@nikloy](https://discuss.circleci.com/u/nikloy)\ **Replies:** 0\ **Last updated:** [November 30, 2018, 11:51am UTC](https://discuss.circleci.com/t/fastlane-concurrent-simulators-cause-connection-abort/26856 "2018-11-30T11:51:38Z")
Hi, I’m facing the same issue: https://discuss.circleci.com/t/macos-plan-issue-with-xcrun-simctl-shutdown/21839 It appear when I activate the concurrent simulators in Fastlane. The error is the following: Error Domai… --- ## [Create iOS Framework Release Build with Generic/Actual iOS Device](https://discuss.circleci.com/t/create-ios-framework-release-build-with-generic-actual-ios-device/17331)
**Author:** [@pravin-yudiz](https://discuss.circleci.com/u/pravin-yudiz)\ **Replies:** 0\ **Last updated:** [October 12, 2017, 12:45pm UTC](https://discuss.circleci.com/t/create-ios-framework-release-build-with-generic-actual-ios-device/17331 "2017-10-12T12:45:04Z")
Our project is iOS Framework and in order to create an automated process where committing code on Github, create/update our final product (which is iOS framework) we have created circle.yml. But we are facing an issue, … --- ## [Multiple iOS simulators available for single OS + device configurations](https://discuss.circleci.com/t/multiple-ios-simulators-available-for-single-os-device-configurations/7854)
**Author:** [@anon47539524](https://discuss.circleci.com/u/anon47539524)\ **Replies:** 20\ **Last updated:** [January 19, 2017, 2:38pm UTC](https://discuss.circleci.com/t/multiple-ios-simulators-available-for-single-os-device-configurations/7854 "2017-01-19T14:38:20Z")
EDIT Jan 16 2017: We no longer recommend using UUIDs to start simulators. The OS X image has been updated to resolve the underlying issue, and using UUIDs is no longer necessary. Please check out this post for examples o…