External USB3.0 4TB HDD is not recognized by Mac OS X I've bought an external 4TB HDD. It is this this one. The problem is that my Macbook Air 11" 2013 (with Mac OS X 10.9.2) does not recognize it.

The device is ok. I can use it from other computers with GNU/Linux. But I don't know what happens with my Mac. Disk utils app does not show it in the volumes list, diskutil command either.
I had this problem where I couldn't see my external usb hdd with ntfs format in mac os and I tried DiskUtil where it stuck at loading.

None of above worked for me. But I found this piece of command which miraculously made my hdd drive visible in mac:

set devmgr_show_nonpresent_devices=1


Got it from here:

https://www.online-tech-tips.com/computer-tips/external-hard-drive-not-recognized/