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Table of Contents
Disk not formatted correctly or partitioned
Disk permissions or boot information exception
Installation environment problems or cache interference
Home Computer Tutorials System Installation macOS installer not showing internal drive

macOS installer not showing internal drive

Jul 15, 2025 am 12:17 AM
macos

When the macOS installer does not display the internal hard disk, 1. First check whether the disk format and partition are GUID partition diagram and Mac OS extension (log-style) or APFS; 2. If the format is correct and still invisible, you can use the terminal to rebuild the boot partition and reformat the disk in recovery mode; 3. Troubleshoot installation environment issues, try replacing the boot disk, clearing NVRAM/PRAM, or using a different version of the macOS installer; if the above methods are invalid, it may be a hardware failure. It is recommended to contact Apple Support for further processing.

macOS installer not showing internal drive

It is really a headache to encounter the macOS installer that does not display the internal hard drive. Especially when you are preparing to reinstall the system or upgrade your Mac, the startup disk option cannot be found in the installation interface and you cannot continue to operate. Although this problem is rare, once it occurs, it is often related to disk format, permission settings or system cache.

macOS installer not showing internal drive

Let’s start from several common reasons and talk about how to troubleshoot and solve this problem.

macOS installer not showing internal drive

Disk not formatted correctly or partitioned

The macOS installer only recognizes disk structures in a specific format by default. If your hard disk has been changed to another format (such as exFAT or NTFS), or the partition table type is incorrect (such as MBR instead of GPT), the installer may not recognize the disk.

Solution:

macOS installer not showing internal drive
  • Enter "Recovery Mode" (hold Command R when restarting)
  • Open Disk Utility
  • Select your internal hard disk (not volume, but the entire disk)
  • Click "Erase" and select the following configuration:
    • Format: Mac OS Extension (Log-style) or APFS
    • Solution: GUID partition diagram

After this process, try running the installer and you will usually see the disk.


Disk permissions or boot information exception

Sometimes, even if the disk format is OK, it may be due to corruption of permissions and errors in boot records, which may cause the installer to not see it.

Actions that can be tried:

  • Open the terminal in recovery mode, enter diskutil list to see if the disk is recognized by the system
  • If the disk exists but is not available, try rebuilding the boot partition:
    • Enter the command: gpt destroy /dev/diskX (X is your disk number)
    • Enter again: gpt create /dev/diskX
    • Then reformat the disk

Note: These operations will clear disk data. Be sure to confirm that important files have been backed up before performing.


Installation environment problems or cache interference

Sometimes it is a problem with the installer itself, such as the USB boot disk used, or the system cache interferes with the recognition logic.

Suggested practices:

  • Try changing to a well-made boot disk
  • Clear NVRAM/PRAM: Press and hold Option Command PR during restart until the second start of sound is released (M1/M2 chip Mac, press and hold the power button until the option appears)
  • Try using a different macOS installation version, some old versions do not support new hardware

Basically, these common reasons and solutions are all about them. If you have tried all the above, it may be a hardware-level problem, such as hard disk damage or interface failure. It is recommended to contact Apple support or professional maintenance personnel for further inspection.

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