‘Unable To Set Startup Disk’ Error 104 – Complete Solution

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The startup disc is a hard drive inside your Mac that contains the operating system and system files. A Mac may sometimes become unbootable, displaying the message ‘no starting disc’ on the screen.

Try a few alternative techniques to fix the no startup disc Mac issue before you lose any data or files from the unbootable Mac.

This post has provided four remedies to the no-starting disc problem on your Mac.

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How can you tell if your Mac’s startup disc or hard drive is damaged?

If you continue to get error warnings or files with jumbled names that will not open, your hard drive is most likely failing or damaged.

If your main drive fails, your Mac will gradually cease booting and show the MacBook ‘no startup disc’ message.

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How can I resolve the no-starting disc problem?

  • In macOS Recovery Mode, repair the startup disc.

  • Turn on your Mac and hold down the power button until the Startup Options dialogue box displays. Then, after selecting the gear icon labeled Options, pick Continue. If your device is equipped with an Intel CPU, hold down the Command and R keys until the Apple logo displays.
  • After selecting a user, you will be requested to provide a password in order to continue. You’ll then be brought to macOS Recovery mode, where you may choose Disk Utility from the menu and press Continue.
  • Navigate to View, then Show All Devices in the Disk Utility window.
  • If the Startup disc displays, pick it and then click the First Aid icon before pressing the Run button. First Aid will search the selected volume for errors and try to fix them.

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Make the starting disc visible in Disk Utility

  • Turn off your Mac and disconnect any attached gadgets.
  • Check that the connector is in excellent working condition and that the connection is secure if you installed macOS on an external hard drive. Restart the hard disc.
  • Follow the steps in solution 1 to launch Disk Utility in macOS Recovery and restore the starting disc.
  • Reset your Mac’s NVRAM

  • Shut down your Mac, then restart it while holding down the Option, Command, P, and R keys at the same time.
  • Once your Mac has powered up, make sure your desired starting disc is selected in the Startup Disk settings.
  • Use Stellar Data Recovery Professional for Mac to recover data from a non-bootable disc.

For the M1 chip system:

  • To turn on your Mac, press and hold the Power/Touch ID button until Recovery mode displays.
  • Continue after selecting Options.
  • The macOS Recovery window opens. To access the login page, click Next.
  • Enter the Admin Password and press the Continue button. A screen displaying the Recovery mode displays.
  • Connect your Mac to an active Wi-Fi network before continuing with the following steps.
  • To access the Terminal box, pick the Terminal option from the Utilities menu.
  • In the terminal window, type sh (curl http://www.stellardatarecovery.co.in/StellarDataRecovery.xml) and click Return.
  • Accept the License Agreement to access Stellar Data Recovery’s user interface.
  • Select Scan after selecting the drive to be recovered.
  • When the scan is finished, a dialogue window with the message Scanning Completed Successfully! Appears, as seen below. To proceed, click OK.
  • To retrieve data, click Recover. On the screen, an Activation window displays.

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For all other computers with the T2 security chip:

  • To turn on your Mac, press and hold the Power/Touch ID button.
  • Press and hold the Command + R buttons simultaneously until the Recovery mode screen displays.
  • Connect your Mac to an active Wi-Fi network before continuing with the following steps.
  • To access the Terminal box, pick the Terminal option from the Utilities menu.
  • In the terminal window, type sh (curl http://www.stellardatarecovery.co.in/StellarDataRecovery.xml) and click Return.
  • Accept the License Agreement to access Stellar Data Recovery’s user interface.
  • Select Scan after selecting the drive to be recovered.
  • When the scan is finished, a dialogue window with the message Scanning Completed Successfully! appears, as seen below. To proceed, click OK.
  • Click the Restore option to recover the data. On the screen, an Activation window displays.

The demo version is just intended for testing. You must first activate the program in order to use it fully.

To activate the program, enter the Activation Key sent to you after purchasing it.

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