Can Yi 1.5 9B Chat run on Mac mini M2 24GB?

Q: Is unified memory on Mac mini M2 24GB as fast as VRAM for Yi 1.5 9B Chat?

Not always. Mac mini M2 24GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.

YES — Runs Great

C48Usable

Estimated from fit model

Yi 1.5 9B Chat needs ~10.0 GB VRAM. Mac mini M2 24GB has 17.3 GB. With Q4_K_M quantization, expect ~12 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: Very 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) — 10.0 GB, 11.8 tok/s, Runs well

10.0 GB required17.3 GB available

58% VRAM used

Fit status

Runs well

Decode

11.8 tok/s

TTFT

16352 ms

Safe context

126K

Memory

10.0 GB / 17.3 GB

Memory breakdown

Weights5.5 GB

KV Cache1.1 GB

Runtime0.9 GB

Headroom2.6 GB

See how fast it feels

See how fast it feelsYi 1.5 9B Chat on Mac mini M2 24GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 11.8 tok/s decode · 16.4s TTFT (warm) · 30 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

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

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs well	11.8 tok/s	8919 ms	126K
Coding	C	Runs well	11.8 tok/s	16352 ms	126K
Agentic Coding	C	Runs well	11.8 tok/s	23784 ms	126K
Reasoning	C	Runs well	11.8 tok/s	19325 ms	126K
RAG	C	Runs well	11.8 tok/s	29730 ms	126K

Quantization options

How Yi 1.5 9B Chat (9B params) fits at each quantization level on Mac mini M2 24GB (17.3 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	C47
Q3_K_S	3	4.4 GB	Low	C47
NVFP4	4

Get started

Copy-paste commands to run Yi 1.5 9B Chat on your machine.

Run

lms load hf-bartowski--yi-1-5-9b-chat-gguf && lms server start

Upgrade options

Hardware that runs Yi 1.5 9B Chat well

MacBook Pro M2 Max 32GBBudget pick

32 GB Unified (+8)400 GB/s (+300)

Raises estimated decode speed by about 258%.42.3 tok/s decode

Raises estimated decode speed by about 258%.

Adds memory headroom for longer context windows and future model growth.

~$1,999 MSRP

MacBook Pro M2 Pro 32GBBest value

32 GB Unified (+8)200 GB/s (+100)

Raises estimated decode speed by about 116%.25.5 tok/s decode

Raises estimated decode speed by about 116%.

Adds memory headroom for longer context windows and future model growth.

~$1,999 MSRP

Mac Studio M2 Ultra 64GBApple upgrade

64 GB Unified (+40)800 GB/s (+700)

Raises estimated decode speed by about 616%.84.5 tok/s decode

Raises estimated decode speed by about 616%.

Adds memory headroom for longer context windows and future model growth.

~$3,999 MSRP

Frequently asked questions

Can Mac mini M2 24GB run Yi 1.5 9B Chat?

Yes, Mac mini M2 24GB can run Yi 1.5 9B Chat with a C grade (Runs well). Expected decode speed: 11.8 tok/s.

How much VRAM does Yi 1.5 9B Chat need?

Yi 1.5 9B Chat (9B parameters) requires approximately 10.0 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi 1.5 9B Chat?

The recommended quantization for Yi 1.5 9B Chat is Q4_K_M, which balances quality and memory efficiency.

What speed will Yi 1.5 9B Chat run at on Mac mini M2 24GB?

On Mac mini M2 24GB, Yi 1.5 9B Chat achieves approximately 11.8 tokens per second decode speed with a time-to-first-token of 16352ms using Q4_K_M quantization.

Can Mac mini M2 24GB run Yi 1.5 9B Chat for coding?

For coding workloads, Yi 1.5 9B Chat on Mac mini M2 24GB receives a C grade with 11.8 tok/s and 126K context.

What context window can Yi 1.5 9B Chat use on Mac mini M2 24GB?

On Mac mini M2 24GB, Yi 1.5 9B Chat can safely use up to 126K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

Is unified memory on Mac mini M2 24GB as fast as VRAM for Yi 1.5 9B Chat?

See all results for Mac mini M2 24GB See all hardware for Yi 1.5 9B Chat

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