Last updated Oct 2026

Run AI on your Mac.
Know what to buy and what to run.

LocalAIModelOnMac answers three questions in plain English: which Mac to buy (new, refurbished, used or open-box), which open-weight model to run on it, and what all the jargon means — parameters, “active” parameters, 4-bit, GGUF, MLX.

Which Mac should I buy?Which model fits my Mac?Explain the jargon

Quick answer: which Mac runs which model?

The single number that matters most is memory (unified RAM). The model has to fit in it. Sizes below assume 4-bit versions, the standard way people run models on a Mac.

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Mac memory	Typical Macs	What runs comfortably	Example models	Typical cost (USD)
16GB	Base M6 Mac mini, base M5 MacBook Air, many used M1–M4 Macs	Small models up to roughly 8–12B parameters	Gemma 4 E4B / 12B, Qwen3.5 9B, Liquid LFM2.5 (1.2B–8B)	New $899–$1,299 Used ~$450–$800
24–32GB	M6 Mac mini or M5 MacBook Air upgraded; M5 Pro MacBook Pro / Mac mini base (24GB)	Mid-size models around 24–35B, especially efficient MoE ones	Qwen3.8 27B, Gemma 4 26B A4B, LFM2.5-24B-A2B; Gemma 4 31B and Qwen3.6 35B-A3B at 32GB	New $1,099–$2,199 Refurb/used from ~$830
48–64GB	M5 Pro Mac mini, M5 Max Mac Studio, used M1/M2 Max or M4 Pro	The same mid-size models at higher quality (8-bit) with long conversations, or two models at once	Qwen3.8 27B or Gemma 4 31B at 8-bit; coding models in the 30–80B MoE range	New $2,299–$3,499 Used ~$1,250–$2,700
96–128GB	M5 Max Mac Studio 128GB, M5 Ultra 96GB, used M2 Max 96GB, M3/M4 Max 128GB, M1/M2 Ultra, M3 Ultra 96GB	Large MoE models around 100–125B total parameters	Qwen3.5 122B-A10B, Mistral Small 4, Llama 4 Scout, Qwen3.8-Flash-Next (compressed)	New $5,099–$5,499 Refurb/used ~$2,400–$4,900
192–256GB	M5 Ultra Mac Studio 256GB (the only new option); used M2 Ultra 192GB, used/refurb M3 Ultra 256GB	Very large MoE models around 280–400B total	GLM-5.3-Flash and DeepSeek V4-Flash (4-bit at 256GB; ~3-bit at 192GB), Llama 4 Maverick (tight)	New from $9,499 Used ~$3,700–$5,950 (192GB), ~$6,700–$9,800 (256GB)
512GB	M5 Ultra Mac Studio 512GB (announced for late Oct 2026), rare used M3 Ultra 512GB	The biggest single-Mac models, tightly	GLM-5.3 (very tight), DeepSeek V4.1-Flash (aggressive compression)	New: price not listed yet Used: rare (one sale seen at $23,174)
More than one Mac	Two or more Mac Studios linked over Thunderbolt 5	Frontier-size open models	Meta Muse Spark Open (Meta says it’s optimized for two M5 Ultra Mac Studios)	Two 256GB M5 Ultra Studios: ~$19,000 new (2	Two Ultra Studios: well over $15k

Rule of thumb, not a guarantee. macOS keeps part of the memory for itself, and long chats need extra room, so leave headroom. Details on the models page. Costs are US prices checked Oct 17, 2026: new = Apple list price; used/refurb = recent sold prices and asking prices from Swappa, eBay and price trackers. Check current price — see the buying guide for details.

Three things to know before you start

1. Memory beats speed

A Mac with more RAM and an older chip often beats a newer Mac with less RAM for local AI. You can’t add memory later, so buy as much as your budget allows.

Mac buying guide →

2. Big isn’t always better

Modern 27–35B models are surprisingly capable, and “mixture-of-experts” models run much faster than their size suggests.

Model directory →

3. Start with a free app

LM Studio or Ollama get you chatting with a local model in about ten minutes, no coding needed.

Tools guide →

Run AI on your Mac.Know what to buy and what to run.