Search Advanced Search
General Questions (55)
Studio Series (23)
Evolution Series (40)
G-DRIVE Family (42)
G-RAID Family (52)
G-SPEED/G-SAFE Family (53)
G-MINI (16)
G-SATA (14)
Advanced Search
Search our FAQ to find resolutions to common issues.
External Drive Troubleshooting - Mac



Check the power and data cable

  • Check that the power cable is securely connected to the external drive and wall socket (applies only to desktop external hard drives).
  • Do not connect the drive through a USB hub, connect it directly to the Mac. Make sure the power adapter is connected directly to a wall outlet, not to an extension cord.
  • Ensure the cable is securely connected to both the drive and computer.
  • If your external hard drive came with with a Y-cable, use both USB connectors to ensure the drive is getting the appropriate power.
  • If you are connecting to a Mac, use the USB ports found on the back of the computer. Avoid using USB ports found on keyboards, monitors or the front of the Mac.
  • If the problem still continues, try using a different USB port.

Check the Drive Partition using Disk Utilities

  1. Click "Go" on the top menu bar, then choose "Utilities" and open the "Disk Utility" application.
  2. If the drive is not on the desktop or if "Disk Utility" is showing that the drive is formatted in a file system that is not recognized by the Mac OS, the drive can be formatted so the the Mac OS will recognize it.


Check System Profiler

The Mac System Profiler will show you whether the external drive is physically detected by the Mac.

  1. Click on the "Apple Menu" in the top left corner of your desktop.
  2. Select "About this Mac" and then click on "More Info" to open the System Profiler Application.
  3. When the System Profiler opens click on "USB" in the left menu under the Hardware category.
  4. If the drive is still not visible, try connecting it to a second Mac to verify the issue.
  5. If the drive fails on the second Mac, create an RMA and return the drive under Warranty.

Print  Email  Save  Notify Me  Delete from Favorites 
Article ID: 54 Article Created: 04-01-2011 00:05 AMLast Modified: 09-11-2013 18:07 PM

How well did this article answer your question? 100% 75% 50% 25% 0%

Most Recently Viewed Articles
How to format/reformat your drive for Mac (HFS+)
 Follow these steps to format your drive for use on the Mac:...
External Drive Troubleshooting - Windows
Basic External Drive Troubleshooting steps for Windows. ...
Quick Setup for G-Technology Products
Formatting NTFS for Windows
 This article contains information on how to format your G-Technology Hard Drive in NTFS for use with Windows....
Is it okay to leave my external drive turned on all the time?
What is Thunderbolt 2?
Thunderbolt 2 uses the same size port and Thunderbolt cable, but doubles the speed by using a controller chip that uses the original two 10Gbps bi-directional channels and combines them into a single 20Gbps bi-directional channel. Thunderbolt 2 will also support DisplayPort 1.2, which enables video streaming to one 4k monitor, or dual QHD displays. Thunderbolt 2 is backward compatible with Thunderbolt.  ...
Will a PCMCIA / Cardbus adapter card power my G-Drive Mini or G-Raid Mini?
Most PCMCIA and Cardbus adapters PC 32/54 cards are not designed to POWER external devices....
How many Thunderbolt devices can I attach?
One of the great features with Thunderbolt technology is the ability to daisy-chain up to 6 high-performance devices. Please note that only 2 display devices can be used within the 6 Thunderbolt device daisy chain. Additionally, any device with only one Thunderbolt port must be the last device in the daisy-chain....
Installing a RAID controller for your G-SPEED eS
 This article contains information on how tinstall a RAID Controller for your G-SPEED eS....
What is the difference between the G-DRIVE and G-RAID?