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.

Source-backed Last updated May 14, 2026 1 source Needs local verification

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: May 14, 2026
Verification status: Source-backed
Evidence: 1 public source URL

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for Ollama, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

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(<nil>)) 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.

Diagnostic flow for this page

Match 500 Internal Server Error: llama runner process has terminated: %!w(<nil>) exactly before applying the quick fix.
Compare the failing environment with Ollama versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does 500 Internal Server Error: llama runner process has terminated: %!w(<nil>) mean in Ollama?

500 Internal Server Error: llama runner process has terminated: %!w(<nil>) indicates the workflow described by "Ollama 500 Internal Server Error on Apple M5 — Metal Compiler Failed to Build Request" failed in a Ollama context. Start by confirming the exact signature and the component that emitted it.

What should I check first for 500 Internal Server Error: llama runner process has terminated: %!w(<nil>)?

Check whether this cause matches your environment: 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(<nil>)) and doesn't point to the Metal compiler root cause.

Is the 500 Internal Server Error: llama runner process has terminated: %!w(<nil>) guidance source-backed?

The "Ollama 500 Internal Server Error on Apple M5 — Metal Compiler Failed to Build Request" page is labeled source-backed. It has 1 public source URL from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for 500 Internal Server Error: llama runner process has terminated: %!w(<nil>)?

For "Ollama 500 Internal Server Error on Apple M5 — Metal Compiler Failed to Build Request", avoid applying "Compare the failing environment with a known working setup, then change one configuration value at a time." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging 500 Internal Server Error: llama runner process has terminated: %!w(<nil>)?

For "Ollama 500 Internal Server Error on Apple M5 — Metal Compiler Failed to Build Request", collect the failing Ollama command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.