I don't know what black magic you're up to but I see more like 30-35t/s on a 16" M5 Max using 3.8:27b Q4, regardless of whether it's mlx or gguf.
qwen3.5:122b-a10b is significantly faster at around 60-65.
qwen3.5:122b-a10b is significantly faster at around 60-65.