AP Apple Consumer Unified memory

Apple M4 Max 36GB

Runs downloadable LLMs up to ~50B at Q4, ~82.9-99.9 tok/s on an 8B model.

Other configs: 48GB · 64GB · 128GB
Apple M4 Max 36GB
36GB
Unified memory
546
GB/s bandwidth
50B
Max model (Q4)
$3,000
MSRP

What you can run

At 8k context, FP16 KV. Full-speed tok/s holds up to "max ctx"; beyond it the context spills to SSD swap and drops to the degraded figure.

Model sizeFP16Q8Q4
3B 61.9-74.6 t/s
≤380k ctx · then ~1.1-1.4 (slow)
123.8-149.2 t/s
≤426k ctx · then ~2.3-2.7 (slow)
221-266.5 t/s
≤446k ctx · then ~4-4.9 (slow)
7-8B 23.2-28 t/s
≤114k ctx · then ~0.4-0.5 (slow)
46.4-56 t/s
≤175k ctx · then ~0.9-1 (slow)
82.9-99.9 t/s
≤202k ctx · then ~1.5-1.8 (slow)
13B 14.3-17.2 t/s
≤30k ctx · then ~0.3-0.3 (slow)
28.6-34.4 t/s
≤109k ctx · then ~0.5-0.6 (slow)
51-61.5 t/s
≤144k ctx · then ~0.9-1.1 (slow)
32B won't run won't run 20.7-25 t/s
≤50k ctx · then ~0.4-0.5 (slow)
70B won't run won't run won't run
120B won't run won't run won't run
400B won't run won't run won't run

Estimate: tok/s ≈ bandwidth ÷ (params × bytes/param) × efficiency (Apple). Cyan = fits ~32.4 GB usable. Beyond "ctx", KV spills to SSD swap (rough degraded speed shown).

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About the Apple M4 Max 36GB

Apple M4 Max 36GB is a unified-memory system from Apple on Apple M4, 2024. For local genAI the numbers that matter are its 36 GB (how big a model + context fits) and 546 GB/s bandwidth (generation speed).

Frequently asked questions

What size LLM can the Apple M4 Max 36GB run?

With ~32.4 GB usable it runs up to ~50B at Q4 (~14.5B at FP16) at 8k context. Bigger spills into SSD swap and slows sharply.

How many tokens/sec does the Apple M4 Max 36GB generate?

Generation is bandwidth-bound. At 546 GB/s an 8B model at Q4 runs ~82.9-99.9 tok/s (estimate).

Why does long context slow it down?

The KV cache for the context must also fit fast memory; once weights+KV exceed 32.4 GB it spills to SSD swap and throughput collapses. Each row shows the max usable context.