Can Command R+ 104B run on MacBook Pro M3 Max 128GB?

YES — Tight Fit

B62Good

○Estimated from fit model

Command R+ 104B needs ~81.6 GB VRAM. MacBook Pro M3 Max 128GB has 92.2 GB. With Q4_K_M quantization, expect ~4 tok/s.

Runtime: llama.cppCapacity: TightBandwidth: LowStack: StandardBottleneck: Memory bandwidth

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 81.6 GB, 4.1 tok/s, Tight fit

81.6 GB required92.2 GB available

89% VRAM used

Fit status

Tight fit

Decode

4.1 tok/s

TTFT

47057 ms

Safe context

66K

Memory

81.6 GB / 92.2 GB

Memory breakdown

Weights63.4 GB

KV Cache3.4 GB

Runtime0.9 GB

Headroom13.8 GB

See how fast it feels

See how fast it feelsCommand R+ 104B on MacBook Pro M3 Max 128GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.

Given information:
 - Speed = 60 mph (miles per hour)
 - Time = 2.5 hours

Formula: Distance = Speed x Time

Calculation:
 Distance = 60 mph x 2.5 h
 = 150 miles

The train travels 150 miles.

Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.

Breakdown:
 - First half: 1.25 hours at 60 mph = 75 miles
 - Stop: 20 minutes (no distance)
 - Second half: 1.25 hours at 60 mph = 75 miles

Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph

The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 4.1 tok/s decode · 47.1s TTFT (warm) · 10 tok/s prefill

What limits this setup

The model fits in shared memory, but shared-memory bandwidth is now the real limiter.

Fit does not mean dedicated-VRAM speed

Unified or shared memory can make a model technically fit, but sustained tokens per second may still trail a discrete high-bandwidth GPU with less total memory.

Shared-memory contention still exists

The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.

Best improvement path

Prioritize bandwidth, not only capacity

If this workload feels slow, the next useful step is often a GPU tier with materially faster memory bandwidth rather than only a small bump in capacity.

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	B	Tight fit	4.1 tok/s	25668 ms	66K
Coding	B	Tight fit	4.1 tok/s	47057 ms	66K
Agentic Coding	B	Tight fit	4.1 tok/s	68447 ms	66K
Reasoning	B	Tight fit	4.1 tok/s	55613 ms	66K
RAG	B	Tight fit	4.1 tok/s	85559 ms	66K

Quantization options

How Command R+ 104B (104B params) fits at each quantization level on MacBook Pro M3 Max 128GB (92.2 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	40.6 GB	Low	B63
Q3_K_S	3	51.0 GB	Low	B65
NVFP4	4	58.2 GB	Medium	B65
Q4_K_M	4	63.4 GB	Medium	B65
Q5_K_MBest for your GPU	5	74.9 GB	High	B65
Q6_K	6	85.3 GB	High	F0
Q8_0	8	111.3 GB	Very High	F0
F16	16	213.2 GB	Maximum	F0