Runtimes

Runtimes are the OS images (iOS, tvOS, watchOS, visionOS) that simulators use. You need a runtime installed before you can create or boot simulators for that platform.

Core Actions

Action	Command
List installed runtimes	`flowdeck simulator runtime list`
See downloadable runtimes	`flowdeck simulator runtime available`
Install a runtime	`flowdeck simulator runtime install iOS 18.1`
Remove a runtime	`flowdeck simulator runtime delete "iOS 17.2"`
Remove one exact build	`flowdeck simulator runtime delete <identifier> --build 24A5390f`
Prune simulators for a runtime	`flowdeck simulator runtime prune "iOS 18.0"`

Several builds of one OS version share a runtime identifier. Without --build, delete removes whichever of them simctl lists first — which may not be the one you meant.

See the Runtimes command reference for all flags and filters.

Overview

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Core Actions

​Core Actions

Core Actions