My mac does not detect my hard drive after the upgrade. How to solve this problem?

My mac does not detect my hard drive after upgrading to Mac OS Sierra. How to solve this problem?

Please provide more detailed information. You can read write an effective communities of Apple support question. Maybe you could open disk utility and take a screen snap so that we can see what you see.

To post a screenshot

  1. Press command + shift + 4, that will change the cursor to the line of sight.
  2. Hold down the mouse button and the collimator allows you to select the part of the screen you want to capture.
  3. Release the mouse button and the image will be saved on your desktop.
  4. Click on the camera icon in the toolbar of the message forum Editor.
  5. Drag the image on the button select a file and click the Insert button.

Tags: Mac OS & System Software

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