

But not all adapters are known to work correctly in Target Disk Mode, so if you can, connect directly to the same port type. Using adapters to connect Thunderbolt to FireWire will usually work, as will Thunderbolt to USB-C. Ideally, you should connect similar ports that is FireWire to FireWire, Thunderbolt to Thunderbolt, or USB-C to USB-C. An appropriate cable to make the connection.If I buy a Thunderbolt 3 to Thunderbolt 2 adapter and a Thunderbolt 2 cable, would I be able to use Target Disk Mode from my 2017 15' Thunderbolt-3. We recommend shutting down both Macs before proceeding, however. However, the USB wouldn't boot on the old laptop, and the tech support guy at R-Studio said the only way I could do it was to run R-Studio on another Mac and read the drive using Target Disk Mode.

All of the connection types (FireWire, Thunderbolt, and USB-C) support hot connecting, meaning you can connect a cable between the two Macs while they are powered on. That may seem obvious, but it makes sense to point out that Target Disk Mode only works between two Macs you can’t chain multiple Macs together. I can't find a specific Apple KB reference, but the consensus seems to be that you need Firewire, Thunderbolt or USB-C USB 2 doesn't appear to be supported.įrom the MacSales blog - Mac OS 101: How to Boot and Use a Mac in Target Disk Mode
