External hard drive not showing up in disk utility mac

If I plug it into another computer, it works perfectly. In fact, I plugged it into a Surface RT of all things and I was able to read and write with no problem. It also works on another Mac MBP Here's the kicker: I have another FreeAgent Go drive, exact same model and size as the one that dosen't work, and if I plug it in to the exact same dock, it works. I have checked my console logs and the only thing that comes up when plug in the failed drive is the error message.

External Hard Drive Not Showing Up on Mac – What to do

I have removed all USB drives, did a warm reboot, a cold reboot and even a reboot in safe mode: Everything I have searched for has something about not being able to boot and the fix is repairing the disk via recovery console. That's not my issue.

I can boot just fine. I just started having this exact same problem with my FreeAgent Go drive which has always been working perfectly. Like the original poster I cannot see the drive in Disk Utility but it does show up in System Information. When I force quit that process in Activity Monitor it's owned by Root so you'll need to give it permission , the volume immediately appeared in Disk Utility. I'm running a repair on it now - fingers crossed. I'm shocked that they hide it from Disk Utility while it's happening though - much better would have been to display the drive there without mounting the partition, and display a message that this is being done.

The problem was VirtualBox. Specifically, the Windows 7 VM instance I had running was "grabbing" the device for itself. It was doing it automatically so I couldn't see anything. Now, this is where it becomes confusing I haven't changed the settings in any of those VMs in at least 2 months and the the Windows 7 machine in at least a year. I don't need to; as everything was working. But when I was done, they were disabled. Somehow, they got re-enabled.

Disk Drill Pro recovery app is available from Setapp , along with dozens of Mac apps that will make your life easier. Never have to worry about a crashed or corrupted external drive again. Then use a different port to connect the external hard drive. For Macs with removable batteries, you need to switch them off, remove the battery, then press and hold the power button for 5 seconds.

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After that, put the battery back in, plug in the power adapter and switch the power on again. It is possible to format a hard drive so it can be read on Mac and Windows computers, providing you format using exFAT. Console shows if an external drive or any error is detected under the Errors and Faults tab. If no errors show up, then the problem is not caused by the device. To sum up, there are lots of potential solutions for a Mac not reading an external hard drive. If we were to pick one, Disk Drill seems to be the most well-rounded, offering plenty of customizations and power in an easy-to-use interface.

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External Hard Drive Not Showing Up on Mac – What to do

Okay More info. This system utility lists all connected drives, with mounted or unmounted partitions listed below. If your drive appears in Disk Utility but you are unable to mount any partitions, you may still be able to recover data from that drive.

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Some users have reported success in getting their previously missing drives to show up by rebuilding the macOS launch services database. You can rebuild the database by downloading and installing free maintenance app OnyX.

Launch it and input your administrator password so that OnyX can make changes. The app may ask to verify the structure of your desk; click Continue and wait if so. OnyX will appear unresponsive while the process completes. Once OnyX comes back to life, click on the Maintenance tab followed by Rebuilding. Make sure that LaunchServices is checked you can uncheck the rest then click Run Tasks at the bottom of the window.

External Drive Troubleshooting – Mac

While this happens, Finder may become unresponsive. Once the process is complete, restart your Mac. Try reconnecting your missing drive once it reboots. Some older drives require USB leads with separate power connectors. You can try switching out the cable for another and seeing if that makes a difference.

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• 1. Change the Finder settings.
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You can confirm whether or not the drive is faulty by trying to connect it to another computer, if you have one. One potential solution is searching online for your particular brand and model. Manufacturers may have included Mac drivers as a separate download. If you have outstanding updates to apply, try applying them and trying again. In particular, some firmware updates relate specifically to peripherals and devices that connect via USB.