Can Solar 7B run on MacBook Pro M4 Max 128GB?
YES — Runs Great
B67Good○Estimated from fit model
Solar 7B needs ~21.9 GB VRAM. MacBook Pro M4 Max 128GB has 92.2 GB. With Q4_K_M quantization, expect ~81 tok/s.
Runtime: llama.cppCapacity: RoomyBandwidth: MediumStack: 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.
Select quantization to explore
Q4_K_M (Medium quality) — 21.9 GB, 94.4 tok/s, Runs well
21.9 GB required92.2 GB available
Memory breakdown
Weights4.3 GB
KV Cache2.9 GB
Runtime0.9 GB
Headroom13.8 GB
See how fast it feels
See how fast it feelsSolar 7B on MacBook Pro M4 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: 94.4 tok/s decode · 2.1s TTFT (warm) · 236 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 | 80.6 tok/s | 1311 ms | 8K |
| Coding | B | Runs well | 80.6 tok/s | 2403 ms | 8K |
| Agentic Coding | B | Runs well | 80.6 tok/s | 3496 ms | 8K |
| Reasoning | B | Runs well | 80.6 tok/s | 2840 ms | 8K |
| RAG | B | Runs well | 80.6 tok/s | 4370 ms | 8K |
Quantization options
How Solar 7B (7B params) fits at each quantization level on MacBook Pro M4 Max 128GB (92.2 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|
Q2_K | 2 | 2.7 GB | Low | B60 |
Q3_K_S | 3 | 3.4 GB | Low | B60 |
NVFP4 | 4 |
Get started
Copy-paste commands to run Solar 7B on your machine.
Run
lms load Solar-7B && lms server start
Frequently asked questions
F16Best for your GPU | 16 | 14.3 GB | Maximum | B61 |
Not always. MacBook Pro M4 Max 128GB 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.
