Hard drive wont read on mac

Restart your computer and try to connect the hard drive again. In addition to Portable Devices, you can expand out Disk Drives and try to uninstall the device from there if it is not showing up properly in Windows Explorer. If you are connecting to a USB hub, disconnect that and try to connect the drive directly to the computer. The only way you can really tell if the problem is with the computer or the hard drive at this point is to connect the drive to another computer. If it appears that there is a problem with the drive itself, you can try to download the diagnostic tools from the drive manufacturer.

Just about all the major brands like Seagate, Western Digital, Toshiba, etc.

4 solutions to Mac not recognizing internal hard drive issue

You can also read my previous post on checking your hard drive for errors for more information and more tools to test hard drives. If the drive has become corrupt or has bad sectors, these tools can fix it. If you have a USB 3. Firstly, make sure you are using an appropriate cable. So try out several cables before you give up.

Quick Tip: Solving "Read Only" External Drive Problems on Your Mac

Secondly, you might need to update the driver in Windows. Make sure the hard drive has the correct external power adapter and that the light on the front of the drive is turning on and is not orange or red. Also, try using different cables as some are able to carry more power than others.


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Hopefully, this article will help you get your external hard drive recognized by Windows or Mac. Founder of Online Tech Tips and managing editor. He began blogging in and quit his job in to blog full-time. He has over 15 years of industry experience in IT and holds several technical certifications. Read Aseem's Full Bio.

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Before We Begin: Read-Only Volumes and NTFS

Sometimes the fix is easy, other times not so much. How to Fix Svchost. Double-click the drive on your desktop or select it from the left frame of a Finder window to view the contents of the drive. You can start dragging and dropping files into the drive, or copy files to your Mac's internal hard drive. Open the Disk Utility. Most external hard drives are pre-formatted to work with Windows computers, but this severely limits their functionality on a Mac. If your new external drive is formatted for Windows, you'll be able to read from it but you won't be able to write to it.

You can format it to the proper file system using Disk Utility. This is fine for new drives, but if you're trying to use an older drive that already has files on it, you'll need to save them before you start formatting. Select the hard drive from the left menu. You'll see a list of all of your connected drives in this menu. Select your new external drive from the list.

If you don't see your drive here, see the next section.

Click the "Erase" button at the top of the Disk Utility window. This will start the drive formatting process. This will erase everything on the hard drive, so make sure any important data has been backed up. If the drive is in Windows format, you can still copy the files you want to save to your Mac before formatting it.

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This format is compatible with Mac OS X, Windows, and Linux, allowing you to move your hard drive easily between systems. Click "Erase" to format the drive with the selected format. This is irreversible, and will erase all data that is currently on the drive.

The time the format takes will vary depending on the size of the drive. Try your newly-formatted drive. Once the drive has been formatted properly, it will appear on your desktop. Double-click it to open it, and you should be able to add file to it and remove files from it. Ensure the drive is properly connected. Make sure that all of the cables are properly connected to the drive and to the Mac.

If a cable has come lose, the drive will not appear. Make sure the drive has enough power. Some external drives require a separate power connection. You may need to get dual USB cable. This cable has a single USB plug on one end that goes into the external drive, and then splits into two plugs that both get inserted into your Mac.

Restart your Mac. Oftentimes, there are problems with your Mac or hard drive that can be fixed with a simple power cycle. Shut your computer down completely from the Apple menu, and then turn it back on with the Power button.

1. Connect Your Drive and Check /Volumes/

There's a good chance that the drive you connected will appear after restarting. Try different cables and ports. Run First Aid on the drive. Disk Utility includes some drive repair functions that can get a malfunctioning drive working again. Open Disk Utility from the Utilities folder.

Select your drive and click the "First Aid" button. Click "Run" to begin scanning the drive for errors. Allow the utility to fix any errors it finds. This may allow you to start using the drive again. Be aware that if errors have appeared, this could be an early warning sign of impending disk failure. Consider replacing the drive. All hard drives eventually fail.

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Mac doesn't recognize external hard drive, how to fix?

The probability that you hard drive will fail increases with each year that you use it. Even new drives fail at a rate that would surprise most people. If your drive is four years or older and isn't appearing no matter what you do, there's a very good chance that it's simply dead. You can try plugging it into a different computer to see if it appears.

If it's not appearing anywhere, it may be time for a new drive. Yes No. Not Helpful 0 Helpful 4. I have an external hard drive that it is attached to the new Macbook pro via an adapter. How can I access the drive? If it has the correct format, it will show up in you desktop. Not Helpful 1 Helpful 4. The contents will only be erased if you format or partition the connected hard drive.