

However, this will prevent you from accessing FileVault encrypted home directories over Target Disk Mode. You are suggested to turn on FileVault encryption. Step 4: Quit the utility and then choose Apple menu > Restart. Step 3: Click Turn off Firmware and enter your firmware password to disable it.

Step 2: From the utility window, click Utilities in the menu bar and select Firmware Password Utility or Startup Security Utility. Step 1: Reboot your Mac and hold down Command + R button to enter into Recovery Mode.

You need to turn off the firmware password before booting the Mac in Target Disk Mode. If the Mac has a firmware password set, it will prevent access to your Mac’s startup disk unless you know the password, and your Mac will not even boot into Target Disk Mode. This post will show you why Target Disk Mode is not working and how to fix this issue. However, there are times that you aren’t able to see the target computer on the host computer in FireWire mode. You would simply use a FireWire or Thunderbolt cable so that the two Macs are connected, and one of them appears as an external hard disk on the other. This can be used if your Mac won’t boot and you need to get files off of it. Target Disk Mode is a handy boot utility that enables you to boot from a separate drive and transfer data from one Mac to another Mac.
