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jahbuzzz

macrumors member
Original poster
Jul 9, 2009
45
1
Hi All,
Looking for some help. All of a sudden my iMac will not detect my seagate 4tb drive. 3.49tb available. I'm working off Mojave 10.14.4. Its showing up on other computers. Any ideas?
TIA
 

BigMcGuire

Cancelled
Jan 10, 2012
9,832
14,032
Do you see it in Disk Utility? I had something similar happen once on my MBP. It stopped showing drives I connected to it in Finder. I had to manually mount disks in Disk Utility until a reboot then everything went back to normal. :p
 

jahbuzzz

macrumors member
Original poster
Jul 9, 2009
45
1
What is the format?
Is it HFS+?
Is it APFS?
Is it a PC format?
APFS I presume - I formatted it out of the box.
Image from disk utility on other mac attached.
 

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Fishrrman

macrumors Penryn
Feb 20, 2009
29,175
13,223
It's formatted HFS+.
See: "4tb USB External Physical Volume OS X Extended".

Just wondering -- did you use any kind of encryption on the drive?

Disclaimer:
I don't use APFS. I'm an "HFS+ forever guy".

Did I read somewhere that an APFS-booted Mac won't mount an HFS+ drive that has been encrypted? (I could be totally wrong on this)

Others, please jump in and correct me if I'm wrong about that!
 

jahbuzzz

macrumors member
Original poster
Jul 9, 2009
45
1
Thing is it was working perfectly then all of a sudden it doesnt show up
 

jahbuzzz

macrumors member
Original poster
Jul 9, 2009
45
1
If you mean doesn't show on the desktop go into Finder Preferences and make sure the option to show external disks is selected.
Hi thanks - one of the first things I did though. It seems I have baffled the internet with this one!
[doublepost=1557743989][/doublepost]Wow! Just wow! Happened upon this nugget while doing a search and it worked!

"Try a Super Slow Jam
Strange but true, some users found that their thumb drives work when they plug it in extremely slowly. When they try and plug in the USB flash drive normally, their PC’s don’t recognize the drives. But if they gently slide them into the port in slo-mo, their drives are recognized! Go figure."
 
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