# executeCommandsInBuffer(_:range:) Encodes an instruction to run commands from an indirect buffer. ``` func executeCommandsInBuffer(_ buffer: any MTLIndirectCommandBuffer, range: Range) ``` ## Parameters `buffer` The [`MTLIndirectCommandBuffer`](/documentation/Metal/MTLIndirectCommandBuffer) instance containing the commands to execute. `range` The range of commands to execute. When running on Metal devices that belong to the [`MTLGPUFamily.mac2`](/documentation/Metal/MTLGPUFamily/mac2) GPU family, the maximum length of the range is 0x4000 (16,384) commands. 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)