mac book internal harddisk not showing

If your MacBook's internal hard disk is not showing up, there could be several reasons for this issue. Here are some troubleshooting steps you can try:

1. Check the connections: Ensure that the hard drive's cable is properly connected to your MacBook's logic board. If it is loose or damaged, try to reconnect it properly or replace it with a new cable.

2. Restart your MacBook: Sometimes, restarting your MacBook can help detect the hard drive. Try restarting your MacBook and see if it detects the hard drive.

3. Check disk utility: Open Disk Utility and see if the internal hard drive is visible. If it is visible but grayed out, it might need to be mounted. Click on the Mount button to mount the hard drive.

4. Reset NVRAM or PRAM: Resetting the NVRAM or PRAM can help in fixing the issue. To reset NVRAM or PRAM, shut down your MacBook and press the Command + Option + P + R keys simultaneously while turning it on. Hold down the keys until the Apple logo appears and disappears twice.

5. Boot into safe mode: Booting into safe mode can help in detecting and fixing the issue. To do this, shut down your MacBook, and then press and hold the Shift key while turning it on.

6. Check for updates: Ensure that your MacBook has the latest updates installed. Go to the Apple menu and click on About This Mac. Then, click on the Software Update button to check for updates.

If none of these steps work, it could be a hardware issue, and you might need to take your MacBook to an authorized service center for further diagnosis and repair.