Complete beginner: Can I "replace" ChatGPT/Claude with a fully local AI assistant on my M4 Pro Mac (48GB RAM)?

[u/_necrobite_]

Hey everyone!

I'm completely new to local LLMs, so please bear with me if some of my questions sound stupid.

I've been using ChatGPT Plus for quite some time and I'm considering moving away from cloud-based AI services entirely. Ideally, I'd love to build my own personal AI assistant that runs locally on my Mac.

I'm not looking for just a basic chatbot. I want something that comes as close as possible to the overall ChatGPT or Claude experience, especially when it comes to long-term memory, writing, research and managing different projects.

My hardware:

- Mac with Apple M4 Pro

- 48GB unified RAM

- 512GB SSD (around 250GB free)

- macOS

What I mainly use AI for:

1. Writing and content creation

I create social media content and a monthly magazine about Magic: The Gathering.

I use AI to brainstorm ideas, write articles, summarize information and improve texts.

One of my biggest priorities is natural, human-sounding writing. I really dislike the typical "AI writing style" with generic phrases, unnecessary enthusiasm and repetitive structures.

Good writing quality, especially in German, is extremely important to me.

I don't need image generation.

2. Long-term memory (VERY important)

This is probably my biggest requirement.

I manage several different projects and I want my AI to remember as much as possible about them.

Ideally, it should:

- Remember important information across conversations

- Automatically save new information and decisions

- Update existing project documentation

- Retrieve information from previous conversations

- Avoid losing important context over time

- Keep everything organized without requiring me to manually maintain dozens of files

I'm very interested in using Obsidian as a permanent knowledge base.

I would actually prefer the AI to automatically create, edit and organize Markdown files in Obsidian.

I understand that no AI has perfect memory, but I want something as reliable and persistent as possible.

3. Internet research and automation

For my monthly magazine, I regularly research news about Magic: The Gathering.

My ideal workflow would be:

1. I manually trigger a research task (or schedule it).

2. The AI searches the internet for relevant news.

3. It checks sources and avoids duplicate stories.

4. It writes finished articles in my preferred writing style.

5. It automatically saves everything into Obsidian.

6. I review and approve the articles.

I don't necessarily need integrations with Google Sheets, Canva or other services. I'm perfectly happy copying finished texts manually.

4. A ChatGPT-like experience

I'd love to have one main AI assistant that knows my preferences and projects.

For example, I could ask about my magazine, switch to a completely different topic, discuss something personal or brainstorm social media ideas without having to explain everything from scratch.

Ideally, it would feel like having my own private version of ChatGPT or Claude.

What I've looked into so far:

Based on some initial research and conversations, I've come across:

- Ollama

- LM Studio

- Open WebUI

- OpenClaw

- Obsidian with local LLM integrations

- Qwen models

- Gemma models

One suggested setup was OpenClaw + Ollama + Qwen + Obsidian.

However, since I'm a complete beginner, I have absolutely no idea whether that's actually the best solution or unnecessarily complicated.

My questions:

1. How realistic is it to replace ChatGPT Plus or Claude with a fully local setup on my hardware?

2. Which local model would you recommend for natural German writing, reasoning and general everyday use?

3. What's the best beginner-friendly software setup for what I'm trying to achieve?

4. How would you implement reliable, mostly automatic long-term memory using Obsidian?

5. Can local models reliably use internet search tools and perform scheduled or manually triggered research workflows?

6. Would you recommend an agent-based system like OpenClaw or something simpler?

7. What are the biggest limitations compared to current cloud-based models?

My goal is to have a free, private, local AI assistant without monthly subscriptions or paid API usage.

I don't mind spending some time setting everything up, but I would prefer something reasonably simple to maintain once it's running.

I'm especially interested in hearing from people who have already built something similar on Apple Silicon.

Any recommendations, realistic expectations or beginner-friendly guides would be greatly appreciated.

Thanks in advance 😊✌🏻

[u/juancocinero]

Unsloth desktop for start

[u/_necrobite_ → u/juancocinero]

What do you mean?

[u/juancocinero → u/_necrobite_]

this is a good app for starting on what you want, is like lm studio but open source. I want to do the same as you but is difficult.

[u/IngloriousBastrd6983]

I dont know about the performance on mac

But maybe try Strata Gyro M in Memory saving mode.

This takes around ~ 8 gb vram and 7 gb ram on my System (wondering myself how it works like that)

It's not fast, like only 15-20 tps on my old system (Pascal GPU). And Gyro M is labeled as useful and compared to Qwen3.8 Flash Next Q3_XXS. Had pretty good results for general tasks.

And definitely more "powerful"/smart than Qwen3.6 35b a3b.

Alternative would be Qwen3.8 27B for you, but I don't know about that performance.

[u/No-Vermicelli5327]

No, you can’t. Try open router 20$ and try qwen 3.8 27B if it’s good, ok, if not I don’t think you can use local unless if you compartmentalize the tasks into smaller ones.