I have a 6TB G-Drive with Thunderbolt. It was given to me by a client for a video project. They formatted it exFat as they run Mac and PC in house. I can see the drive showing up in disk utilities but “mount” is greyed out so I cannot mount the drive on my system. The client says the drive shows up on their Macs. In fact they have given me two of these drives. Neither mounts on my Late 2015 running OS X 10.11.6 The same thing happens on my older desktop Mac Pro 2009 running the same OS.
Am I missing something? Are there drivers that I should be running for this?
Thank you for any and all help. I’m in a crunch here.
It should mount just fine as exFAT support has been in Mac OS for a few years now and 10.11 will definitely support it.
It is possible the partition is corrupted to an extent that your system doesn’t want to mount it.
If you launch the Disk Utility you can see the drive and if selected check below at its details. It will have a Device ID of sorts something along the lines of “disk3s2” It might not be that exactly but it will be similar.
If you can figure out which drive it is showing as then you can run a command on the Terminal.
Below is the command you type into Terminal:
sudo fsck_exfat -d disks
Replace * with the drive numbers as shown in disk utility.
sudo will require you to enter your computer’s administrative password
When it prompts: Main boot region needs to be updated. Yes/No? Type yes.
After a reboot of the machine the drive should mount and be usable.
The best option if it still works on other systems is to have them move the data off, then reformat the drives with a clean exfat and then put the data back on.