External USB3.0 4TB HDD is not recognized by Mac OS X
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/