Following up again, in case you see this. I was just in oMLX trying to set up the new 26B QAT models with MTP, and I noticed this message:

  Kernel iogpu.wired_limit_mb is only 48.0 GB; oMLX can only allocate up to 48.0 GB. Raise it in Terminal:
  sudo sysctl iogpu.wired_limit_mb=59392