Best Local AI Models for iMac
Configure your iMac
Chip.
Processing power.
+$200 for the 12-core GPU at 16 GB: same generation speed (both 153 GB/s), prompt reading about 20% faster.
Qwen3.5 9B Instruct · estimated speeds · Prompt-speed source
Memory.
Storage.
Your top 10 models need about 65 GB. 1TB holds them 15 times over.
- EnclosureUGREEN USB4 NVMe enclosureUSB4, 40Gb/s · ASM2464PD · aluminum fins · M.2 2280 up to 8TBAmazon
- DriveSamsung 990 PRO 1TBPCIe 4.0 NVMe · M.2 2280 · no heatsink, fits the enclosureAmazon
40Gb/s USB4 enclosure.
Storage does not change model speed.
Keep Ollama's models on the drive
launchctl setenv OLLAMA_MODELS "/Volumes/Models/ollama"Ollama FAQModelFit may earn a commission from these links.
Model filters.
Best models for iMac M6 · 16 GB
| Model | Quant | Fit | Run | |||||
|---|---|---|---|---|---|---|---|---|
| 1 | est. 28 tok/s · Runs well | 9B | 7.0 GB | Runs well | 24.2 | 28 | ||
| 2 | est. 53 tok/s · Runs well | 12.1B moe 2.5B | Q4_K_M | 8.1 GB | Runs well | n/a | 53 | llama-server -hf, via llama.cpp |
| 3 | est. 35 tok/s · Runs well | 4B | Q4_K_M | 7.9 GB | Runs well | n/a | 35 | |
| 4 | est. 18 tok/s · Runs well | 12B | Q4_K_M | 8.0 GB | Runs well | 21.6 | 18 | |
| 5 | est. 27 tok/s · Runs well | 9B | Q4_K_M | 5.8 GB | Runs well | n/a | 27 | llama-server -hf, via llama.cpp |
| 6 | est. 28 tok/s · Runs well | 9B | Q4_K_M | 5.6 GB | Runs well | n/a | 28 | |
| 7 | est. 79 tok/s · Runs well | 8.3B moe 1.5B | Q4_K_M | 5.5 GB | Runs well | n/a | 79 | |
| 8 | est. 49 tok/s · Lots of room | 4B | 3.5 GB | Lots of room | 19.0 | 49 | ||
| 9 | est. 20 tok/s · Runs well | 8.8B | Q4_K_M | 6.4 GB | Runs well | n/a | 20 | llama-server -hf, via llama.cpp |
| 10 | est. 28 tok/s · Runs well | 4.5B | 7.5 GB | Runs well | 13.3 | 28 | ||
| 11 | est. 23 tok/s · Runs well | 8.4B | Q4_K_M | 6.0 GB | Runs well | 7.3 | 23 | |
| 12 | est. 15 tok/s · Runs well | 13.5B | Q4_K_M | 9.1 GB | Runs well | 9.8 | 15 | |
| 13 | est. 27 tok/s · Runs well | 8.7B | Q4_K_M | 5.7 GB | Runs well | n/a | 27 | |
| 14 | est. 27 tok/s · Runs well | 8B | 6.5 GB | Runs well | -3.1 | 27 | ||
| 15 | est. 24 tok/s · Runs well | 8.8B | Q4_K_M | 5.0 GB | Runs well | 19.3 | 24 | |
| 16 | est. 64 tok/s · Runs well | 2.3B | 4.6 GB | Runs well | 6.3 | 64 | ||
| 17 | est. 26 tok/s · Runs well | 8B | 6.5 GB | Runs well | n/a | 26 | ||
| 18 | est. 65 tok/s · Lots of room | 2B | Q4_K_M | 1.8 GB | Lots of room | 3.3 | 65 | |
| 19 | est. 18 tok/s · Runs well | 7B | 7.5 GB | Runs well | 7.9 | 18 | ||
| 20 | est. 30 tok/s · Runs well | 7B | Q4_K_M | 5.5 GB | Runs well | -3.6 | 30 |
Select a row to update the summaryMemory includes 8k contextEstimated speeds · verified run commandsQuality: LLM Stats Score · Data by LLM Stats
| Model | Fits | Quality | App |
|---|---|---|---|
| FLUX.2 [klein]Apache 2.0 (4B), FLUX Non-Commercial License (9B) | Runs · Stated16 GB unified memory · flux-2-swift-mlx, Klein 4B int4 or qint8 · flux-2-swift-mlx README | No independent score yet | flux-2-swift-mlx, Diffusers, stable-diffusion.cpp |
| Qwen-Image-2.1Qwen Research License Agreement | Runs · Stated16 GB unified memory · mlx-serve 4-bit pack, text encoder freed before the denoise · mlx-serve changelog | #19 of 82 in text to image11,441 votessnapshot 2026-10-07 | Diffusers with staged loading, Diffusers, stable-diffusion.cpp |
| SDXL Base 1.0CreativeML Open RAIL++-M License | Runs · PublishedApple M2 Pro · 16 GB unified memory · ComfyUI fp16, 1344x768, 20 steps, about 190 s · ComfyUI issue #948 | No independent score yet | ComfyUI, Rapid-MLX, stable-diffusion.cpp |
| FLUX 3 Image KleinFLUX Kommunity License v1.0 | unknownComplete: Q4_K_M GGUF12.9 GB download | No independent score yet | Diffusers, mflux |
| Z-Image-TurboApache 2.0 | unknownComplete: Q4_K_M GGUF13.2 GB download | #59 of 82 in text to image24,808 votessnapshot 2026-10-07 | Diffusers, mflux, stable-diffusion.cpp |
| FLUX.2 [dev]FLUX Non-Commercial License | Does not fit est.Complete: Q4_K_M GGUF34.8 GB download | #38 of 82 in text to image77,988 votessnapshot 2026-10-07 | flux-2-swift-mlx, Diffusers, ComfyUI, stable-diffusion.cpp |
| Krea 2 TurboKrea 2 Community License Agreement v.1 | Does not fit est.Complete: Turbo Q4_K_M GGUF16.9 GB download | No independent score yet | ComfyUI-Krea2-MLX, Diffusers, stable-diffusion.cpp |
| Stable Diffusion 3.5 LargeStability AI Community License | Does not fit est.Complete: Q4_0 GGUF16.4 GB download | #81 of 82 in text to image23,396 votessnapshot 2026-10-07 | ComfyUI, Rapid-MLX |
Quality: blind human votes from Arena (arena.ai), CC BY 4.0, snapshot 2026-10-07. Scores are for the Arena checkpoint, not your local quantized build.
| Model | Fits | Quality | App |
|---|---|---|---|
| LTX-2.3LTX-2 Community License Agreement | Runs · Stated16 GB unified memory · ltx-2-mlx int4 pack · ltx-2-mlx README | No independent score yet | Lightricks/LTX-2 ltx-pipelines, appautomaton/ltx-video-mlx, ComfyUI |
| Wan2.1Apache License 2.0 | Runs · Stated16 GB unified memory · mlx-video 4-bit conversion · mlx-video Wan README | No independent score yet | ml-explore/mlx-examples Wan2.1, ComfyUI, FastVideo MLX (FastMetal) |
| Mochi 1 previewApache License 2.0 | unknownComplete: calcuis GGUF Q3_K_M with Q4_0 T5 and FP8 VAE7.7 GB download | #48 of 48 in text to video5,893 votessnapshot 2026-09-22 | Diffusers, ComfyUI |
| Wan2.2 TI2V 5BApache License 2.0 | unknownComplete: QuantStack GGUF Q8_013.5 GB download | No independent score yet | Blaizzy/mlx-video, FastVideo MLX (FastMetal), ComfyUI |
| MiniMax H3MiniMax H3 Community License Agreement | Does not fit est.Complete: Unsloth GGUF Q4_K denoiser with the Q4_K_M Qwen3-VL encoder35.5 GB download | #8 of 48 in text to video11,417 votessnapshot 2026-09-22 | Argus-AiTeam/minimax-h3-mac (MLX streaming), antirez/h3.c (Metal), ddalcu/mlx-serve, stable-diffusion.cpp, ComfyUI |
| Wan2.2 A14BApache License 2.0 | Does not fit est.Complete: QuantStack GGUF Q4_K_M (high and low noise)26.3 GB download | #42 of 48 in text to video10,458 votessnapshot 2026-09-22 | PocketAI Wan2.2 MLX (pocketai-wan-video), ComfyUI |
Quality: blind human votes from Arena (arena.ai), CC BY 4.0, snapshot 2026-09-22. Scores are for the Arena checkpoint, not your local quantized build.
See how fast it feels
Qwen3.5 9B Instruct: ~1.2s to start, then est. 28 tok/s, typical error 10%.
~ $ ollama run qwen3.5:9b
# Press Send to run the fixed message below.
# fixed message, the same for every model
>>> Summarize these meeting notes in one short paragraph: what was decided, and who does what next.
[meeting-notes.txt]
Weekly sync, support tools team Attendees: Maya (lead), Jonas, Priya, Tom, Elena Agenda: local drafting assistant pilot, knowledge base cleanup, customer feedback survey, on-call rota, next steps 1. Local drafting assistant pilot - Maya recapped the goal: agents draft replies with an assistant that runs on the team's own Macs, so customer emails never leave the building and nothing depends on an outside service being up. - Jonas ran the pilot for two weeks on four machines. Agents used it for first drafts on roughly a third of tickets. Most drafts needed light edits. A few needed a full rewrite, mostly billing questions where the model guessed at policy instead of saying it did not know. - Priya said the biggest complaint was the wait before the first word on long tickets. Short tickets felt instant. Tickets with a long email thread pasted in took several seconds before anything appeared, and agents read that as the tool being stuck. Two agents restarted the app because of it. - Tom suggested trimming the thread to the last three messages before sending it to the model. Elena worried that would drop context the customer refers back to, like an order number from the first email. Agreed to test both on the same set of tickets before choosing. - Jonas said the speed once the reply starts was fine on every machine. Agents read slower than the model writes, so nobody asked for faster output. The only request was a visible sign that the model is reading, so people stop restarting it. - Memory: the oldest machine, the one with the least memory, could not keep the model loaded next to the browser and the ticketing app. It swapped and slowed down badly by mid-morning. The other three machines had no issue all day. - Priya asked whether a larger model would fix the billing guesses. Jonas thought not: the model guesses because the policy text it needs is missing or contradictory, and a bigger model would guess more fluently, not less. - Decision: keep the current model size for now. Revisit only after the knowledge base cleanup, and only if the edit rate on billing drafts is still high. 2. Knowledge base cleanup - Elena found about forty articles that contradict each other on refund windows and plan changes. These are the likely source of the billing guesses. - Priya proposed one owner per section, with a review date on every article so stale pages show up on their own instead of during an angry ticket. - Agreed: Elena owns billing and refunds, Priya owns accounts and login, Tom owns shipping and returns. Each owner archives duplicates, merges the rest, and flags anything that needs a policy decision from Maya. - Jonas will add the cleaned articles to the assistant's reference folder once each section is signed off, not before. Mixing old and new versions would make the guessing worse. - Tom asked for a template for new articles. Elena will share the one billing already uses. 3. Customer feedback survey - Priya shared the quarterly survey results. Response time scores went up since the last quarter, and the free-text comments mention faster first replies more than once. - Several comments still complain about being asked for the same order details twice. Elena thinks this happens when a ticket moves between agents and the notes field is left empty. - Agreed: the handover checklist gets one new line, fill in the notes field before reassigning a ticket. Tom will update the checklist and post it in the team channel. - Maya wants the next survey to ask one question about reply quality, not only speed, so the team can see whether the assistant drafts change how customers rate answers. 4. On-call rota - Two people asked to swap weeks in November. Maya approved both swaps. - Tom raised that weekend coverage gets thin when two people are on leave at the same time. Agreed that leave requests go in the team channel at least two weeks ahead, and Maya checks the rota before approving. - No change to escalation rules. The escalation doc is still correct. 5. Next steps - Jonas: run the trimmed thread versus full thread test on fifty past tickets and report the wait before the first word and the edit rate for each. - Jonas: add a reading indicator to the assistant panel so agents can see the model is working on a long ticket. - Elena, Priya, Tom: finish their knowledge base sections and send Maya the open policy questions. - Maya: ask IT whether the oldest machine can get more memory or should be replaced at the next refresh. - Everyone: log any draft that invents a policy, with the ticket link, in the shared sheet. - Next sync: same time next week. Maya sends the agenda the day before.
Estimated speed, not a benchmark. Model loading excluded.
Compare configurations
Full comparison| Spec | A · yours | B | Change |
|---|---|---|---|
| Configuration | M6 12C · 16 GB | M6 12C · 24 GB | |
| Apple list price, base storage | $1,699 | $1,899 | +$200 |
| Bandwidth | 153 GB/s | 170 GB/s | +17 GB/s |
| Usable memory | 11.2 GB | 16.8 GB | +5.6 GB |
| Models at 8k | 54 | 70 | +16 |
| Top pick | Qwen3.5 9B Instruct est. 28 tok/s | LFM2 24B-A2B Instruct est. 66 tok/s | |
| Max context | ~134k | 125k, max |
The 24-inch iMac runs local AI on the same base chips as the Mac mini, with 8GB to 32GB of unified memory. The 2026 M6 iMac reaches up to 170 GB/s memory bandwidth, enough for 9B-14B class models at everyday speeds on 24GB and 32GB configs; 8GB M1 and M3 units stay with 4B-class models.
On a iMac, the best local LLM ranges from Qwen3.5 4B Instruct at 8GB to Gemma 4 26B-A4B at 32GB. That spans 8GB to 32GB configurations, where 90 of ModelFit's 129 local models fit comfortably at the top tier. Set your exact chip and memory in the configurator above for its ranked list.
Sizing rule: a local model needs about 0.6 GB of unified memory per billion parameters at Q4, and ModelFit budgets roughly 70% of each configuration's RAM. At 8GB the best fit is Qwen3.5 4B Instruct (~3.5GB); at 32GB it is Gemma 4 26B-A4B (~16GB), reaching est. 38 tok/s, typical error 10%. Mid-range configurations trade model size for speed between those two points. What it will not run: even the 32GB tier leaves Gemma 4 26B-A4B (Q8) (26B) to a cloud API, and the 8GB tier caps out far earlier.
→ Set your exact chip and memory in the configurator above for its ranked models and one-line install command.
- Entry (M1, 8GB)
- Qwen3.5 4B Instruct
- Top (M6, 32GB)
- Gemma 4 26B-A4B
- Decode speed range
- est. 18-38 tok/s, typical error 10%
Speeds are ModelFit estimates from chip bandwidth and model size, not measured benchmarks. Typical error: the median gap between the ModelFit speed model and measured runs on hardware the model was not fitted on, for this backend and model size.
Cite this page: ModelFit, Best Local AI Models for iMac, https://modelfit.io/imac/, updated October 2026, CC BY 4.0.
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Pick your exact iMac chip
Where to buy for local AI
best configs- External SSD · 2TBArchive your model library off the internal drive. Quantized models run 5 to 40GB each, so 2TB holds dozens with room to spare.Check price on Amazon
- USB4 NVMe Enclosure40Gbps external storage fast enough to run models from. Pair it with an M.2 drive for a portable model vault.Check price on Amazon
- USB-C Hub / DockMore ports for the external drives, displays and peripherals around a local-AI workstation.Check price on Amazon
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Related devices for local AI
Related setup guides
- Best LLM for MacRead our full guide
- How to Set Up OllamaRead our full guide
- Run AI OfflineRead our full guide
- Local AI image generator on MacCompare image models by RAM and app
- Local AI video generator on MacCompare video models by RAM and app
- Local video generation on MacVideo models and apps for Apple Silicon
Popular model families
- QwenAlibaba Cloud: Qwen3.8 27B local flagship (Apache 2.0, vision)
- LlamaMeta: Most popular open-weight model family
- DeepSeekDeepSeek AI: V4.1 Flash: multimodal 552B MoE, API only
- MistralMistral AI: Excellent performance-per-parameter ratio
- GemmaGoogle DeepMind: Gemma 4 E4B: 4.5B effective, runs on 8GB Macs
Frequently asked questions
What is the best AI model for iMac?
The 24-inch iMac runs local AI on the same base chips as the Mac mini, with 8GB to 32GB of unified memory. The 2026 M6 iMac reaches up to 170 GB/s memory bandwidth, enough for 9B-14B class models at everyday speeds on 24GB and 32GB configs; 8GB M1 and M3 units stay with 4B-class models. On the default Apple M6 with 16GB RAM, Qwen3.5 9B Instruct is our top pick, handling models up to about 12B parameters at this RAM. Higher-RAM iMac configurations, including Pro and Max tiers where available, reach into the 9B-14B parameter range.
What size models fit on iMac?
With 16GB unified memory, iMac runs models up to about 12B parameters comfortably. Strong picks include Qwen3.5 9B Instruct, Mellum2.1 12B-A2.5B Thinking, NVIDIA Nemotron 3.5 Bolt E4B. Higher-RAM configurations, including Pro and Max tiers where available, reach into the 9B-14B parameter range. Use the ModelFit wizard to match your exact RAM and chip.
How fast is local AI on iMac?
On the Apple M6 with optimized, quantized models, expect est. 28 tok/s, typical error 10%. The iMac M6 (announced 2026-10-27) comes with a 10-core or 12-core GPU; 32GB needs the 12-core model. Memory bandwidth is 153 GB/s on 16GB and 170 GB/s on 24GB and 32GB. In ModelFit estimates the 24GB config runs a 7B Q4 reference at ~34 tok/s. Pre-orders open October 28, shipping November 6. (Speeds are ModelFit estimates, not measured benchmarks, and vary with model size and quantization.)