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# exec format error: The ARM64 and AMD64 Mismatch Explained
- URL: https://debugly.dev/exec-format-error-arm64-amd64-docker/
- Published: 2026-07-16T09:25:00.000Z
- Updated: 2026-10-17T05:49:14.000Z
- Description: Your image builds on a Mac and dies in production. What the error means, how to check an image's architecture, and how to build multi arch properly.
- Author: Rohit Bhadani
- Tags: Docker, DevOps, Error Autopsy, Kubernetes

| Message                                | Cause                                     |
| -------------------------------------- | ----------------------------------------- |
| exec format error                      | Wrong CPU architecture                    |
| no such file or directory, file exists | Missing dynamic linker, musl versus glibc |
| permission denied                      | Missing execute bit, use COPY --chmod=755 |

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Published on [debugly.dev](https://debugly.dev/) by [Rohit Bhadani](https://debugly.dev/about/) | Founder of [Krova Cloud](https://krova.cloud/?ref=debugly.dev)