Aug 14, 2013 Go into Disk Utility, select the external drive and click on the partition tab. Select 2 partitions etc. As you did before OS X Extended for Time Machine, ExFAT or Free space for Windows. At the bottom click options and select 'Master Boot Record'. Then finally apply the. Dec 10, 2018 Check that the cable from the hard drive to your Mac is connected properly. Check that the external hard drive has power if it needs it. Check the condition of the cable and swap it if you have a spare. Change the hard drive power cable if you have a spare. Plug-in the ExFAT drive into another working Mac Machine and see it is detected. If the drive is recognized, copy your entire data from it. Detach the drive and format it on your host Macintosh (on which your drive was not detected). In case, your drive fails to show up on any other Mac machines then it seems like the problem lies within the. Jan 09, 2020 If your Mac is having problems identifying a flash drive it may be that you did not properly eject a drive that was previously connected to your machine. Failure to eject a USB drive before pulling it out of the port can cause the OS to view the port’s status incorrectly and may impact its ability to be identified and accessed. Nov 14, 2019 Once in the Terminal, type in the command diskutil list A list with information about volumes and drives should appear Look for a section labelled /dev/disk (external, physical) Make a note of the whole line after the word disk Now put the following command into.
Mac or Windows computer not recognizing your external hard drive or flash drive? This is a common problem, especially when connecting hard drives between Mac OS X, Windows and Linux. It can also happen on a single system where it was working just fine for a long time and then suddenly stops being recognized by the operating system.
Sometimes the fix is easy and sometimes it is a bit more complicated. In this article, I’ll try to go through the different solutions on Mac and Windows for fixing this issue. How the drive is formatted and what file system is being used is the most common reason why drive is not recognized.
Assign Drive Letter
The other main reason is that the drive simply is not being recognized by Windows or Mac and therefore won’t even show up on your system at all. This is usually a problem with drivers or hardware. In order to figure out whether your problem is related to formatting or to not being recognized, go to Disk Management in Windows or Disk Utility on OS X and see if the drive shows up there.
If the drive shows up here, but not in Windows Explorer, you might have to assign a drive letter to the disk. Normally, Windows does this automatically, but sometimes because of other connected devices, your external hard drive will be recognized, but not have any drive letter assigned to it. In Disk Management, just right-click on the disk and choose Change Drive Letter and Paths.
Pick a letter for your drive and you should be good to go. If the drive is showing, but you’re getting messages about the drive needing to be formatted, etc., then read the next section below.
On Macs, the drive should automatically appear on the desktop. If not, go to Disk Utility and check to see if it appears under the heading External.
If the drive is showing here, but not on the OS X desktop, then click First Aid to try and repair the drive. If the drive has a file system not recognized by OS X, you’ll need to erase it and the format it using FAT or HFS+.
If the drive is not showing up in Disk Management or Disk Utility at all, you have some other type of problem. Scroll down to the Not Showing Up section below.
Format Drive
When it comes to file formats, there are a couple of major formats that are used about 99% of the time: FAT32 and NTFS for Windows and HFS+ (Mac OS Extended) for Macs. Now OS X can read and write to FAT32 formatted drives, but can only read NTFS volumes.
Windows is worse in the sense that it cannot even read or write to HFS+ formatted volumes by default. You can get Windows to do it, but you have to purchase third-party software. The only other option is to format the hard drive and use the FAT32 format for the best compatibility.
When you connect a HFS+ formatted drive to Windows, you’ll get a message stating that the drive needs to be formatted in order to be used.
If you see this message, it just means that Windows does not recognize the file system on the drive. Make sure you connect the drive to the appropriate operating system and backup any data that you might need before performing a format.
So what’s the best format to use so that you can see your hard drive on multiple operating systems? The legacy format that is most compatible is FAT32, but it limits you to only 4 GB for max file size. You can read my previous post on how to format an external hard drive using FAT32.
If you need support for bigger files, then you should use the exFAT format. It’s newer and supports much larger files, but only works with newer versions of OS X and Windows. You’ll have to be running OS X Snow Leopard (10.6) or higher or Windows XP or higher.
In Windows, you can choose exFAT as the file system format in addition to NTFS and FAT32. When you format a drive in OS X using Disk Utility, you can also choose the exFAT format if you like.
Drive Not Showing Up
If you connect the drive to the computer and nothing happens, one of several things could be going on: your hard drive might have a problem, the correct software or drivers are not installed on your system, or there is something not working properly with the operating system. Let’s start with some common problems and their solutions.
Windows – Device Manager
Sometimes old drivers can cause a device to malfunction when connected to Windows. You can try fixing this by first going to the command prompt (Start and type in CMD) and running the following command:
Once you do that, open Device Manager (Start and type in device manager) and then click on View – Show Hidden Devices.
Expand out Portable Devices, right-click on any items that are grayed out and choose Uninstall. 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.
Windows – USB Device
If you connect your USB drive to Windows and get a USB Device Not Recognized error, make sure to check out the link on how to fix that particular problem. Windows tries to blame the device for malfunctioning, but it’s normally a problem with Windows.
USB Ports/Secondary PC
You can also try plugging the drive into another USB port on the computer to make sure it’s not a problem with that particular port. 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 the drive doesn’t work on another computer, it’s highly likely something is wrong with the drive itself.
Drive Tools
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., have these diagnostic tools.
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.
USB 3.0 Drives
If you have a USB 3.0 external hard drive, there are a couple of extra considerations you have to take into account. Firstly, make sure you are using an appropriate cable. I’ve run into several clients that had this problem and fixed it by simply using a different USB cable. So try out several cables before you give up.
Secondly, you might need to update the driver in Windows. Again, go to Device Manager, expand Universal Serial Bus controllers, right click on the one that has USB 3.0 in the text and choose Update Driver.
Mac Os X Not Recognizing External Hard Drive
Power Issues
The only other possibilities with this type of problem are lack of power or complete hard drive failure. 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.
Hopefully, this article will help you get your external hard drive recognized by Windows or Mac. If not, post a comment and I’ll try to help. Enjoy!
Summary: This post will show you solutions to fix the Mac not recognizing internal hard drive issue. Also, you can learn how to recover lost data from unrecoginzable Mac internal hard drive with data recovery software for Mac - iBoysoft Data Recovery for Mac.
Usually, the internal hard drive is the statup/boot drive for a Mac. It not only loads the operating system but also is responsible for storing data. Therefore, it is frustrating if your Mac doesn't recognize the internal hard drive and you can't access the data on this drive. What's worse, when you want to recover lost data, you find that you don't have any data backup. Luckily, according to your situation, this article will provide 4 feasible solutions for you to fix Mac not recognizing the internal hard drive.
Scenario 1: The internal hard drive can be recognized by Disk Utility
If your Mac doesn't recognize the internal hard drive, you can check if Disk Utility under Recovery Mode is able to recognize it. This really matters because if you can see the drive but the internal hard drive is not mounted in Disk Utility, your internal hard drive has no hardware problem and you can try the following solutions to fix your issue.
Solution 1: Repair with First Aid in Disk Utility
The issue that Mac doesn't recognize the internal hard drive could be fixed with First Aid under Recovery Mode. macOS Recovery is part of the built-in recovery system of your Mac, from which you can start up and use its utilities to repair certain logical errors of the internal hard drive.
Step 1: Restart your Mac and immediately press and hold Command + R keys to get into macOS Recovery mode, then release the keys when you see the Apple logo.
Step 2: Select Disk Utility in macOS/Mac OS X Utilities and click 'Continue'.
Step 3: Select the internal hard drive and run First Aid to check and repair errors in this drive.
Solution 2: Try to boot in Safe Mode
Booting in Safe Mode will check the errors in the directory of your internal hard drive. To boot in Safe Mode, you need to restart the Mac and hold 'Shift' immediately, and release it until you see the login window. When you see a 'Safe Boot' message on the startup window, you can restart the Mac and try to recover data from this internal hard drive.
Solution 3: Recover lost data and erase the unrecognizable internal hard drive
If the internal hard drive is not recognized by your Mac still, then the file system of this internal hard drive could have corrupted. Is there any other way that you can access the data on this unrecognizable internal hard disk? Of course. You can recover lost data from this unrecognizable internal hard disk with Mac data recovery software like iBoysoft Data Recovery for Mac. Then, you can reformat this internal hard drive so that you can use this drive again.
iBoysoft Data Recovery for Mac is professional Mac data recovery software. It can not only recover lost data from a Mac that is unbootable, but also recover documents, photos, emails, music, etc. from formatted/unmountable/inaccessible external drives. This software supports recovering data from encrypted APFS, APFS, HFS+, exFAT, FAT32 drives on macOS Catalina/Mojave/High Sierra/Sierra and OS X 10.11/10.10/10.9/10.8/10.7.
Method 1: If you have only one Mac computer
Mac Os X External Hard Drive Not Recognized Free
If you have only one Mac computer, please directly run iBoysoft Data Recovery for Mac in macOS Recovery mode and recover lost data from the unbootable Mac computer. This method is greatly recommended because it is easier and more effective.
Method 2: If you have two Mac computers
Step 1: Download iBoysoft Data Recovery for Mac on another Mac, install and launch it.
Step 2: Click iBoysoft Data Recovery at the upper left corner of Mac menu bar and select 'Create Boot Drive'.
Step 3: Insert a USB drive into the healthy Mac computer.
Step 4: Follow the wizard to create a bootable recovery USB drive.
Step 5: After you have completed creating boot drive, insert this bootable USB drive into the failed Mac and press the Power button and Option key (⌥) to start the MacBook up.
Step 6: Select iBoysoft Data Recovery for Mac from the boot options.
Note: If you're running macOS Mojave or earlier, iBoysoft Data Recovery for Mac will launch immediately when your Mac boots up. But, if your Mac is running macOS Catalina, you need two additional steps to launch this program.
Portable Hard Drive Not Recognized
span>Step 7: Wait for your Mac to boot up, open 'Terminal' application from 'Utilities' drop-down menu.
Step 8: Run the following command:
Step 9:Follow the wizard to recover lost data from the internal hard drive.
Step 10: Restart the Mac, press and hold Command + R keys immediately to get into macOS Recovery mode.
Step 11: Select Disk Utility in the Utilities and click 'Continue'.
Step 12: Select the internal hard drive and click 'Erase' to reformat this drive.
Step 13: Return to macOS/Mac OS X Utilities in macOS Recovery mode and select 'Reinstall macOS'.
After reinstalling the operating system, this internal hard drive could be showing up again.
Scenario 2: The internal hard drive cannot be recognized by Disk Utility
Mac Os X External Hard Drive Not Recognized Drive
However, if your Mac can't recognize the internal hard drive, this internal hard drive might have some hardware problems. You can either send it to a local repair store, which could be costly, or say goodbye to this drive and buy a new one.