Ollama / Ollama
Ollama 500 Internal Server Error on Apple M5 — Metal Compiler Failed to Build Request
Fix Ollama 500 Internal Server Error Metal compiler failed on Apple M5 Includes evidence for Ollama troubleshooting demand.
- Category
- Ollama
- Error signature
500 Internal Server Error: llama runner process has terminated: %!w(<nil>)- Quick fix
- Compare the failing environment with a known working setup, then change one configuration value at a time.
- Updated
What this error means
500 Internal Server Error: llama runner process has terminated: %!w(<nil>) is a Ollama failure pattern reported for developers trying to fix ollama 500 internal server error metal compiler failed on apple m5. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
24 comments. Clear reproduction on MacBook Pro M5 + macOS 26.3.1 + Ollama 0.20.4. System logs show Metal shader compilation failure. Affects both GPU and CPU-only modes. Multiple users confirm.
Common causes
- Ollama is the most popular local LLM runner. Apple M5 is a new chip. Users hitting this error cannot run any model, even in CPU-only mode. The error message is cryptic (llama runner process terminated: %!w(
)) and doesn’t point to the Metal compiler root cause. - 24 comments. Clear reproduction on MacBook Pro M5 + macOS 26.3.1 + Ollama 0.20.4. System logs show Metal shader compilation failure. Affects both GPU and CPU-only modes. Multiple users confirm.
Quick fixes
- Confirm the exact error signature matches
500 Internal Server Error: llama runner process has terminated: %!w(<nil>). - Check the Ollama account, local tool state, and provider configuration involved in the failing workflow.
- Compare the failing environment with a known working setup, then change one configuration value at a time.
Platform/tool-specific checks
- Verify the command, editor, extension, or API client that produced the error.
- Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
- Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- Keep the working fix documented for the team or deployment environment.
How to prevent it
- Keep provider/tool configuration documented.
- Record non-secret diagnostics such as tool version, provider name, model name, and command path.
- Add a lightweight check before CI or production workflows depend on the tool.
Sources checked
Evidence note: 24 comments. Clear reproduction on MacBook Pro M5 + macOS 26.3.1 + Ollama 0.20.4. System logs show Metal shader compilation failure. Affects both GPU and CPU-only modes. Multiple users confirm.
Related errors
- Ollama Metal shader compilation failure
- Ollama llama runner process terminated
- Ollama 500 Internal Server Error
FAQ
What should I check first?
Start with the exact 500 Internal Server Error: llama runner process has terminated: %!w(<nil>) text and the smallest action that reproduces it.
Can I ignore this error?
No. Treat it as a failed Ollama workflow until the root cause is understood.
Is this guaranteed to have one fix?
No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.
How do I know the fix worked?
Rerun the same command, editor action, or request. The fix is working when that action completes without 500 Internal Server Error: llama runner process has terminated: %!w(<nil>).