Can I run Hy3 on a Mac with 256 GB?

Probably, at 4-bit

The published weights are too big, but a 4-bit version (about 168 GB) would fit, with room for ≈ 71K tokens of context. The site hasn't analyzed a GGUF of Hy3 yet.

Files and context on Mac with 256 GB

Each file of Hy3 (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

Hy3 on other hardware

Popular models that run on Mac with 256 GB

Assumes 75% of the Mac's memory is usable (macOS's default limit for the GPU; it can be raised) and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.