1555 GB/s (+1009)
C
Raises estimated decode speed by about 137%.79.3 tok/s decode
Raises estimated decode speed by about 137%.
~$10,000 MSRP
Can gemma 3 27b it run on MacBook Pro M4 Max 48GB?
YES — Runs Great
C54Usable
○Estimated from fit model
gemma 3 27b it needs ~25.7 GB VRAM. MacBook Pro M4 Max 48GB has 34.6 GB. With Q4_K_M quantization, expect ~33 tok/s.
Runtime: llama.cppCapacity: RoomyBandwidth: MediumStack: StandardBottleneck: Balanced
Share:
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.
Select quantization to explore
Q4_K_M (Medium quality) — 25.7 GB, 33.4 tok/s, Runs well
25.7 GB required34.6 GB available
74% VRAM used
Fit status
Runs well
Decode
33.4 tok/s
TTFT
5792 ms
Safe context
61K
Memory
25.7 GB / 34.6 GB
Memory breakdown
Weights16.5 GB
KV Cache3.2 GB
Runtime0.9 GB
Headroom5.2 GB
See how fast it feels
See how fast it feelsgemma 3 27b it on MacBook Pro M4 Max 48GB
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: 33.4 tok/s decode · 5.8s TTFT (warm) · 84 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 | 33.4 tok/s | 3159 ms | 61K |
| Coding | C | Runs well | 33.4 tok/s | 5792 ms | 61K |
| Agentic Coding | C | Tight fit | 33.4 tok/s | 8424 ms | 61K |
| Reasoning | C | Runs well | 33.4 tok/s | 6845 ms | 61K |
| RAG | C | Tight fit | 33.4 tok/s | 10530 ms | 61K |
Quantization options
How gemma 3 27b it (27B params) fits at each quantization level on MacBook Pro M4 Max 48GB (34.6 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 10.5 GB | Low | C46 |
Q3_K_S | 3 | 13.2 GB | Low | C47 |
NVFP4 | 4 | 15.1 GB | Medium | C48 |
Q4_K_M | 4 | 16.5 GB | Medium | C49 |
Q5_K_M | 5 | 19.4 GB | High | C49 |
Q6_KBest for your GPU | 6 | 22.1 GB | High | C49 |
Q8_0 | 8 | 28.9 GB | Very High | F0 |
F16 | 16 | 55.4 GB | Maximum | F0 |
Get started
Copy-paste commands to run gemma 3 27b it on your machine.
Run
lms load hf-unsloth--gemma-3-27b-it-gguf && lms server startUpgrade options