MacOS local client recommendation?

Can anyone recommend a local client for MacOS that you use for interacting with chatGPT using your openAI API-key?

Welcome to the OpenAI community @ahontzeas.

ChatGPT has an iOS app but is currently only available for free(and Plus) on https://chat.openai.com for macOS.

ChatGPT doesn’t require you to have an API key.

Maybe a late response, I would suggest checking out the MindMac app. It offers support for various providers including OpenAI, Azure, Claude, and OpenRouter. I have personally tried it out and highly recommend it.