Can I Run GLM-5 / GLM-5.1 on Mac Studio (M2 Ultra, 192 GB)?
Autor: Jakub Rusinowski · Ostatnia aktualizacja: 1 maja 2026
No
No — GLM-5 / GLM-5.1 does not fit in Mac Studio (M2 Ultra, 192 GB). Even at Q2_K it needs about 250.6 GB against 144 GB usable, a shortfall of roughly 106.6 GB.
Confidence: medium
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Mac Studio (M2 Ultra, 192 GB) — what it gives a model
| Usable memory for models | 144 GB |
| Memory bandwidth | 800 GB/s |
| Form factor | Desktop |
| Operating system | macOS |
| Memory upgradeable | No — soldered |
GLM-5 / GLM-5.1 on Mac Studio (M2 Ultra, 192 GB): memory by quantization
| Quant | Memory needed | Fits 144 GB? | Max context | Est. speed | Download |
|---|---|---|---|---|---|
| F16 | 1494 GB | ✗ No | — | — | 1488 GB |
| Q8_0 | 796.5 GB | ✗ No | — | — | 790.5 GB |
| Q6_K | 616.1 GB | ✗ No | — | — | 610.1 GB |
| Q5_K_M | 533.3 GB | ✗ No | — | — | 527.3 GB |
| Q4_K_M | 455.2 GB | ✗ No | — | — | 449.2 GB |
| Q3_K_M | 323.2 GB | ✗ No | — | — | 317.1 GB |
| Q2_K | 250.6 GB | ✗ No | — | — | 244.6 GB |
What to watch out for
- This model does not publish its full attention configuration, so the KV-cache share of these figures is inferred from its parameter count rather than computed exactly.
- Memory on this machine is not upgradeable, so the configuration you buy is the ceiling for every model you will ever run on it.
Mac Studio M2 Ultra 192 GB limitations
- Superseded by the M3 Ultra, which is why it is often the better used buy for large-model work.
- Memory is soldered; the configuration chosen at purchase is permanent.
Recommended setup
Ollama or LM Studio (Metal) — MLX for the fastest Apple-native throughput
How these numbers are calculated
- Memory need = quantized weights + KV cache at 8,192 tokens (f16) + 0.8 GB runtime overhead.
- 192 GB unified memory at 800 GB/s, shared between CPU and GPU.
- macOS reserves a share of unified memory for the system, so not all of it is available to a model.
- Throughput is a memory-bandwidth roofline estimate, not a measurement. It is labelled "estimated" everywhere it appears.
- KV cache is inferred from the parameter count because this model does not publish its full attention configuration.
FAQ
Can I run GLM-5 / GLM-5.1 on Mac Studio (M2 Ultra, 192 GB)?
No — GLM-5 / GLM-5.1 does not fit in Mac Studio (M2 Ultra, 192 GB). Even at Q2_K it needs about 250.6 GB against 144 GB usable, a shortfall of roughly 106.6 GB.
What limits GLM-5 / GLM-5.1 on Mac Studio (M2 Ultra, 192 GB)?
Memory. Mac Studio (M2 Ultra, 192 GB) provides about 144 GB usable, and the smallest quantization of this model needs 250.6 GB.
Which runtime should I use?
Ollama or LM Studio (Metal) — MLX for the fastest Apple-native throughput
Other Computers
Other Models on Mac Studio (M2 Ultra, 192 GB)
- GLM-5.3-Flash on Mac Studio (M2 Ultra, 192 GB)
- GPT-OSS on Mac Studio (M2 Ultra, 192 GB)
- Granite 3.0 on Mac Studio (M2 Ultra, 192 GB)
- IBM Granite 4.0 on Mac Studio (M2 Ultra, 192 GB)
- IBM Granite 4.1 on Mac Studio (M2 Ultra, 192 GB)
GLM-5 / GLM-5.1 on GPUs
- GLM-5 / GLM-5.1 on NVIDIA GeForce RTX 5090
- GLM-5 / GLM-5.1 on NVIDIA GeForce RTX 5070
- GLM-5 / GLM-5.1 on NVIDIA GeForce RTX 5060 Ti 8GB
- GLM-5 / GLM-5.1 on NVIDIA GeForce RTX 5060
What This Model Is Good At
- Best local LLMs for coding
- Best local LLMs for document analysis
- Best local LLMs for enterprise assistant
Model & Tools
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