Local AIAI mini PC review
Mac mini (M4) review: the easiest way to run your own AI
Apple's small desktop turns out to be one of the best-value machines for running AI at home — if you buy the memory right at checkout and accept that you can never change it later.
Is the Apple Mac mini (M4) worth buying?
Yes, if you choose an M4 model with 24 GB or 32 GB of memory for more room than the 16 GB base model. Memory cannot be upgraded later. Compare the actual configuration price and budget separately for external storage; the original entry price does not cover our recommended setup.
Compare the exact memory and storage configuration. Our recommendation is editorial research, without recorded speed, power or noise tests here.
Where it's good
- Apple's shared memory design is exactly what AI models want
- Compact complete-computer format
- The software situation for AI on Macs is now genuinely good
- Doubles as a perfectly nice normal computer
Where it bites
- You choose the memory once, at checkout, forever — no upgrades ever
- The 16 GB base model is the wrong buy for AI; 24 GB or 32 GB costs more
- 256 GB of storage fills up fast and Apple's upgrade is overpriced
- Very large models still favour a 128 GB PC over any Mac mini
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Evidence: editorial research, not a documented hands-on test. The retained score is an editorial opinion. But the Mac mini with Apple’s M4 chip has turned into one of the best-value ways to run AI at home, and the reason is the way it handles memory.
This review covers the 2024 M4 model. Apple launched it at $599 in the US with 16 GB of memory on October 29, 2024. That is a historical starting price, not a current offer or the price of the 24–32 GB configuration recommended here.
Buying-page check — 12 October 2026 (US): Apple’s refurbished M4 listing with 32 GB memory, 512 GB storage and 10Gb Ethernet displayed $1,269, but delivery was out of stock, pickup unavailable and Add to Bag disabled. This was a displayed price for an unavailable configuration, not an orderable offer. Recheck that exact configuration before budgeting; this browser observation is not an API-verified price or a hardware test.
Availability follow-up — 17 October 2026 (US): the same refurbished M4 listing still displayed $1,269 for 32 GB memory, 512 GB SSD and 10Gb Ethernet, but Add to Bag remained disabled during this check. This is a dated displayed price, not a currently purchasable offer. We did not test checkout or hardware performance.
The one thing that makes it good at this
In a PC with a dedicated graphics card, the processor and graphics card have separate memory pools, and data moves between them. Apple puts both on one shared pool of fast memory — think a studio apartment instead of two rooms down a hallway. For AI, that means the graphics chip can work from the shared pool rather than being limited to a separate graphics card’s memory.
The practical result: a Mac mini with 32 GB gives a model access to a larger shared memory pool than many entry-level graphics cards. Some of that memory is still needed by macOS and your other apps, so check the requirements of the model you want to run.
Use the model-memory planning guide before choosing unified memory: macOS, applications and the GPU share that pool, so installed capacity is not dedicated VRAM or a guarantee that a model will fit.
What it’s like to live with
We do not have recorded test evidence here for the earlier desk-use, fan-noise, 4 W idle, 30 W load or twenty-minute setup claims. Those claims are withdrawn pending original notes. Do not treat them as measured reasons to buy.
For budgeting, use your workload’s average wall power, hours and electricity tariff. A manufacturer’s specification or another machine’s idle result cannot substitute for that measurement.
The catch, and it’s a real one
You pick your memory when you buy it and you can never change it. Not “it’s hard” — it’s soldered to the board. So the decision at checkout is the whole decision.
The base M4 Mac mini has 16 GB. That can run smaller models, but 24 GB or 32 GB leaves more room for larger models, longer conversations and other apps. Check the memory in the actual listing, especially when buying used or refurbished. Do not compare a 16 GB entry price with a recommendation for 32 GB.
Storage is the other soft spot. 256 GB disappears once you’ve downloaded a few models, each of which can be 5–30 GB. Apple wants a lot to give you more internally. Compare that upgrade with an external SSD sized for your model library, and include the drive in your total budget.
Who should buy it — and who shouldn’t
Buy it if you want a compact, power-efficient route to your own AI and find a 24 GB or 32 GB M4 configuration at a sensible price alongside newer options. Allow for an external drive rather than treating the base-model price as the whole budget.
Buy something else if you want to run the very largest models — a 128 GB AMD machine will hold things the Mac mini can’t — or you’re on a tight budget, where the Beelink SER8 is our budget alternative to compare.
The specs, in plain English
- Chip
- Apple M4 (10-core CPU, 10-core GPU)
- Memory
- 16 GB unified (base); 24 GB or 32 GB configurationsApple's memory is shared between the processor and graphics in one fast pool, which is exactly what AI models want. The catch: you pick the size at checkout and can never change it. For local AI, get 24 GB or 32 GB, not the 16 GB base.
- Storage
- 256 GB SSD (base); upgrades are expensive256 GB fills up fast once you download a few models. Budget for an external SSD rather than Apple's upgrade price.
- Networking
- Gigabit (optional 10GbE), Wi-Fi 6E
The bottom line
If you want to run your own AI with little setup, consider an M4 Mac mini with 24 GB or 32 GB of memory and an external SSD. Compare the total for that exact configuration with newer models before buying. The 16 GB entry price is not the price of the setup recommended here.