Two options will appear on the screen.On the utility screen, navigate to the utility menu item and select Firmware Password Utility.Reboot your Macbook and hold down the + R command to enter recovery mode.So use the boot security utility to make sure that the firmware password protection is disabled. If the firmware password is enabled on your Macbook, you will not be able to access the target drive mode from a cold boot. Step 3 : Click Repair Allto resolve all problems.īy default, your Mac boots from the built-in hard drive, but the boot drive can be any storage device that contains an operating system compatible with your Macbook.Step 2 : Click Start Scan to determine what problems you are experiencing with your computer.Step 1 : Install the PC Repair and Optimizer Tool.If you already have a problem with your computer, this software can help you fix it and prevent other problems from recurring: Plus, this tool offers protection against file loss, malware, and hardware failures, and optimizes your device for maximum performance. This tool is highly recommended to help you fix your error. Whatever the reason for the target drive mode not working, you should be able to fix the problem with the following simple troubleshooting steps. If the destination disk is formatted with APFS, the other Mac must be running High Sierra or higher to be compatible with the host Mac.Īlternatively, the problem occurs because the destination drive is corrupted and the other Mac cannot mount the boot drive as an external drive.

Other reasons why the destination drive is still not mounted or accessible on your Mac include an outdated operating system or a corrupt boot drive. A hardware error is preventing the destination drive mode from working properly.The Finder is set to hide external drives.You are using the wrong cable or port for your Mac.Problems can occur for any of the following reasons: It’s impossible to tell exactly why Target Disk Mode isn’t working on your Mac computer. How do I put my Mac in target drive mode?.Using an external hard drive as a target Mac.

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