Hybrid PMBR is PMBR table with extra partition entries. We still have partition type 0xEE, starting with absolute sector 0. But while UEFI specification conforming PMBR does not have any other partitions defined, the hybrid PMBR does. Such hybrid table is used to provide support for older windows setups with apple bootcamp. Testing done: confirmed we do get GPT and not MBR table.