# executeCommandsInBuffer(_:range:) Encodes a command that runs a range of commands from an indirect command buffer (ICB). ``` func executeCommandsInBuffer(_ buffer: any MTLIndirectCommandBuffer, range: Range) ``` ## Parameters `buffer` An [`MTLIndirectCommandBuffer`](/documentation/Metal/MTLIndirectCommandBuffer) instance that contains other commands the current command runs. `range` A span of integers that represent the command entries in `buffer` the current command runs. When running on Metal devices that belong to the [`MTLGPUFamily.mac2`](/documentation/Metal/MTLGPUFamily/mac2) GPU family, the number of commands needs to be less than or equal to 0x4000 (16,384). Metal devices that belong to an Apple silicon family, such as [`MTLGPUFamily.apple10`](/documentation/Metal/MTLGPUFamily/apple10), don’t have this limitation. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)