ArcSolve Engine Help

About

ArcSolve Engine is a Mac app that runs in the menu bar. It runs local AI models on your Mac.

Agents on the same Mac connect through MCP or local HTTP, choose a model and give it work. An agent authenticates with a connection credential that Engine accepts.

The first release covers the two categories below. Each category offers tiers to choose from.

Speech to Text

quality: Whisper Large v3 · 8bitbalanced: Whisper Large v3 Turbo · 8bitfast: Whisper Large v3 Turbo · 4bit

Text to Speech

quality: Qwen3-TTS 12Hz 1.7B CustomVoice · 8bitfast: Qwen3-TTS 12Hz 0.6B CustomVoice · 8bit

Engine requires a Mac with Apple silicon and macOS 27 or later. It is a free app distributed through the Mac App Store. The menu appears in English or Korean, following the language setting of your Mac.

Start and connect

When you open the app, the Engine icon appears in the menu bar and the server starts at once. On the first launch, Engine creates a new connection credential and opens its menu once to show where the icon is. The app has no window.

When the status line at the top of the menu shows Running, agents can connect. Choose Copy Connection Info and paste the copied address and credential into the agent's MCP or HTTP settings. Do not send the credential to other people.

The copied text has the four lines below. In your agent's MCP settings, enter the MCP address and the Authorization header. For tools that call HTTP, enter the address and the same header. Use the copied address and credential as they are.

ArcSolve Engine
URL: http://127.0.0.1:18731
MCP: http://127.0.0.1:18731/mcp
Authorization: Bearer <credential>

The clipboard item stays on this Mac. It does not go to your other devices through Universal Clipboard.

Agents that share the connection details can access each other's jobs and results. Give them only to agents you trust.

Engine accepts only connections from the same Mac. Other devices cannot connect.

When you choose Quit ArcSolve Engine, running jobs are cancelled and job input and results are deleted. To keep a result, the agent must download it first.

Installing models

The menu lists one row per model under Speech to Text and Text to Speech. Below each row you see its state, such as installed, the download size or the download percentage.

Point to a row and choose Download to download that size. While it downloads, choose Cancel in the same place to stop. Model Info shows the creator, the license and the memory the model needs.

An agent with model management permission can also request an install. Engine from the App Store then shows Requested by an agent on that row and, if you allowed notifications, sends a notification. Engine downloads only when you choose Download. If you choose Decline, nothing is downloaded.

macOS asks you to allow notifications the first time an agent requests a model. Even if you do not allow them, you can download or decline on that model's row in the menu.

Memory warning means the model uses more than half of this Mac's memory. You can still use it. Not available on this Mac means there is not enough memory. That row is dimmed and cannot be downloaded.

The app downloads only models in its catalog. Engine from the App Store downloads models from Apple's servers. Engine installs downloaded files only when they match fixed hashes.

Removing models

Point to an installed row, choose Remove…, and confirm with Remove. Engine deletes the model files and the install record. You can download a removed model again from the menu. An agent with model management permission can also request removal.

Engine does not remove a model while a job uses it. Remove it again after the job ends.

Where data stays

Model files, job input and results stay on your Mac. Models also run on your Mac.

The app does not send input, results or connection information to ArcSolve. Engine returns a result under the connection credential that requested the job. Agents that share the connection details can access each other's jobs and results.

If Engine cannot end normally, for example after a force quit, job files can remain. At the next start, Engine cleans up remaining job files and partly downloaded model packs. If cleanup fails, files can remain.

For details, read the ArcSolve Engine privacy policy.

Troubleshooting

The status line shows Restart

Engine could not restart by itself. Choose Restart. If it keeps happening, contact us.

Not available on this Mac

This Mac does not have enough memory for that model. Choose a lighter tier in the same category.

Install failed because of disk space

Free up storage on your Mac and install again.

Download failed (check your internet connection)

Check your internet connection and choose Download again.

Download failed (server problem)

Engine could not download from the model server. Choose Download again later.

Checking the version

Choose About ArcSolve Engine in the menu to see the version. Include it when you contact us.

Contact

Email support@arcsolve.ai. Start the subject with [ArcSolve Engine]. Do not include original audio, documents or connection credentials.