Mac, DGX Spark, and a Framework Desktop / Ryzen AI Max 395 (ie Strix Halo) will not give you great performance running LLMs. One benefit of the Spark over the others is you can easily link up to 4 of them. Only MoE (sparse) models will be usable. Even if you can run some massive models, they will crawl. You're better off running one or more GPU cards.