Target disk mode in Mac. What is it and what does it do

Even experienced users do not always know about all the hidden features of the Mac and macOS. One such obvious feature is the mode “external disk”. It remains only to understand what this function is what is needed, and figure out the real application scenarios.

What is it?

As you might guess from the name, the mode “external drive” turns the Mac into an analog plug-in drive. Only in much more rapid when compared with a normal USB flash drive or external hard drive. To activate the option on any Mac, including the new models with USB Type-C.

What does it do?

The external drive should be used if you need to quickly transfer large amounts of data between Macs. Due to high speed protocols, FireWire or Thunderbolt, the data transmission will not take much time.

Before beginning, you must enable “external drive” on the computer that will be used as storage.

  • Go to System preferences – > startup disk.
  • Select the option “target disk Mode”.

  • Reaffirm our intentions. After that, the Mac to reboot.
  • Then both computers can be interconnected via FireWire or Thunderbolt. Then, on one of the Mac recognized the drive. You’re done!

After the completion of file operations, it is necessary to remove the mapped drive. After that Mac can be turned off.

There is another way to enter the data transfer mode. During boot macOS, you should hold down the “T”.

What else should you know?

If the computer uses disk encryption FileVault, it cannot be used as a drive. Therefore, before conducting operations, you must disable the option at the time.

  • Launch “System settings” –> “Protection and security”.
  • See “FileVault”, you must deactivate the option and confirm your intention by password.

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