Can Gemma 4 E2B run on Mac Studio M2 Ultra 64GB?

YES — Runs Great

B69Good

Estimated from fit model

Gemma 4 E2B needs ~11.5 GB VRAM. Mac Studio M2 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~71 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced

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) — 11.5 GB, 71.4 tok/s, Runs well

11.5 GB required46.1 GB available

25% VRAM used

Fit status

Runs well

Decode

71.4 tok/s

TTFT

2711 ms

Safe context

128K

Memory

11.5 GB / 46.1 GB

Memory breakdown

Weights3.1 GB

KV Cache0.5 GB

Runtime0.9 GB

Headroom6.9 GB

See how fast it feels

See how fast it feelsGemma 4 E2B on Mac Studio M2 Ultra 64GB
1st promptCold start — includes initialization
>Write a Python function to sort a list
Here's a Python function that sorts a list using quicksort:

def quicksort(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

# Example usage
numbers = [3, 6, 8, 10, 1, 2, 1]
print(quicksort(numbers))  # [1, 1, 2, 3, 6, 8, 10]

The algorithm picks a pivot, partitions the list into smaller, equal, and larger elements, then recursively sorts each partition and concatenates the results.
2nd promptWarm — model ready, no init overhead
>Now add type hints and a docstring
def quicksort(arr: list[int]) -> list[int]:
    """Sort a list using the quicksort algorithm.

    Args:
        arr: List of integers to sort.

    Returns:
        A new sorted list.
    """
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

Added type hints for the input and return type, plus a Google-style docstring.
Estimated: 71.4 tok/s decode · 2.7s TTFT (warm) · 179 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	B	Runs well	71.4 tok/s	1479 ms	128K
Coding	B	Runs well	71.4 tok/s	2711 ms	128K
Agentic Coding	B	Runs well	71.4 tok/s	3944 ms	128K
Reasoning	B	Runs well	71.4 tok/s	3204 ms	128K
RAG	B	Runs well	71.4 tok/s	4930 ms	128K

Quantization options

How Gemma 4 E2B (5.099999904632568B params) fits at each quantization level on Mac Studio M2 Ultra 64GB (46.1 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.0 GB	Low	B64
Q3_K_S	3	2.5 GB	Low	B64
NVFP4	4	2.9 GB	Medium	B64
Q4_K_M	4	3.1 GB	Medium	B64
Q5_K_M	5	3.7 GB	High	B65
Q6_K	6	4.2 GB	High	B65
Q8_0	8	5.5 GB	Very High	B65
F16Best for your GPU	16	10.5 GB	Maximum	B66

Get started

Copy-paste commands to run Gemma 4 E2B on your machine.

Run

ollama run gemma4:e2b

Frequently asked questions

Can Mac Studio M2 Ultra 64GB run Gemma 4 E2B?

Yes, Mac Studio M2 Ultra 64GB can run Gemma 4 E2B with a B grade (Runs well). Expected decode speed: 71.4 tok/s.

How much VRAM does Gemma 4 E2B need?

Gemma 4 E2B (5.099999904632568B parameters) requires approximately 11.5 GB of memory with Q4_K_M quantization.

What is the best quantization for Gemma 4 E2B?

The recommended quantization for Gemma 4 E2B is Q4_K_M, which balances quality and memory efficiency.

What speed will Gemma 4 E2B run at on Mac Studio M2 Ultra 64GB?

On Mac Studio M2 Ultra 64GB, Gemma 4 E2B achieves approximately 71.4 tokens per second decode speed with a time-to-first-token of 2711ms using Q4_K_M quantization.

Can Mac Studio M2 Ultra 64GB run Gemma 4 E2B for coding?

For coding workloads, Gemma 4 E2B on Mac Studio M2 Ultra 64GB receives a B grade with 71.4 tok/s and 128K context.

What context window can Gemma 4 E2B use on Mac Studio M2 Ultra 64GB?

On Mac Studio M2 Ultra 64GB, Gemma 4 E2B can safely use up to 128K tokens of context. The model's official context limit is 128K, but available memory constrains the safe maximum.

Is unified memory on Mac Studio M2 Ultra 64GB as fast as VRAM for Gemma 4 E2B?

Not always. Mac Studio M2 Ultra 64GB 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.

See all results for Mac Studio M2 Ultra 64GB See all hardware for Gemma 4 E2B

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<iframe src="https://willitrunai.com/embed/gemma-4-e2b-on-m2-ultra-64gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

71.4 tok/s

1479 ms

128K

Coding

Runs well

71.4 tok/s

2711 ms

128K

Agentic Coding

Runs well

71.4 tok/s

3944 ms

128K

Reasoning

Runs well

71.4 tok/s

3204 ms

128K

RAG

Runs well

71.4 tok/s

4930 ms

128K

Quantization options

How Gemma 4 E2B (5.099999904632568B params) fits at each quantization level on Mac Studio M2 Ultra 64GB (46.1 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.0 GB	Low	B64
Q3_K_S	3	2.5 GB	Low	B64
NVFP4	4	2.9 GB	Medium	B64
Q4_K_M	4	3.1 GB	Medium	B64
Q5_K_M	5	3.7 GB	High	B65
Q6_K	6	4.2 GB	High	B65
Q8_0	8	5.5 GB	Very High	B65
F16Best for your GPU	16	10.5 GB	Maximum	B66

Frequently asked questions

Can Mac Studio M2 Ultra 64GB run Gemma 4 E2B?

Yes, Mac Studio M2 Ultra 64GB can run Gemma 4 E2B with a B grade (Runs well). Expected decode speed: 71.4 tok/s.

How much VRAM does Gemma 4 E2B need?

Gemma 4 E2B (5.099999904632568B parameters) requires approximately 11.5 GB of memory with Q4_K_M quantization.

What is the best quantization for Gemma 4 E2B?

The recommended quantization for Gemma 4 E2B is Q4_K_M, which balances quality and memory efficiency.

What speed will Gemma 4 E2B run at on Mac Studio M2 Ultra 64GB?

On Mac Studio M2 Ultra 64GB, Gemma 4 E2B achieves approximately 71.4 tokens per second decode speed with a time-to-first-token of 2711ms using Q4_K_M quantization.

Can Mac Studio M2 Ultra 64GB run Gemma 4 E2B for coding?

For coding workloads, Gemma 4 E2B on Mac Studio M2 Ultra 64GB receives a B grade with 71.4 tok/s and 128K context.

What context window can Gemma 4 E2B use on Mac Studio M2 Ultra 64GB?

On Mac Studio M2 Ultra 64GB, Gemma 4 E2B can safely use up to 128K tokens of context. The model's official context limit is 128K, but available memory constrains the safe maximum.

Is unified memory on Mac Studio M2 Ultra 64GB as fast as VRAM for Gemma 4 E2B?