General Requirement: Bootable eSATA host controller.
- Built-in: Any SATA based Mac using a built-in SATA connection adapted to an eSATA connection will support booting. Port multiplier enclosures are not supported.
- Card/HBA: Most eSATA expansion cards or host board adapters will not be bootable. Check with your specific card manufacturer regarding Mac boot support.
PC: Will boot as long as your BIOS supports booting from the eSATA interface. BIOS support will vary by motherboard and host board adapters.