with sierra 10.12.4 no see external hard disks

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Level 1

8 points

with sierra 10.12.4 no see external hard disks

after update to sierra 10.12.4 my imac 27 late 2012 at every boot no see external hard disks (in random mode). Need to activate any time to see.

iMac (27-inch, Late 2012), macOS Sierra (10.12.4)

Posted on Apr 17, 2017 3:40 PM

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Answer 1

bepino Author

Level 1

8 points

Apr 23, 2017 12:23 PM in response to dot.com

Sorry for delay in replying

@Luis: maked reboot in safe mode…no solved :-(

@dot.com

before update to 10.12.4 in macOS, all external hd (also ntfs) and pendrive they are visible; after update to 10.12.4, at every boot I NO SEE in mode random various external peripherals…

i think to want to see all as before update! :-)

I Not use software for mount, I use hd ntfs only occasionally for transfer my files from windows to mac (any transfer is under controllo antivirus)

see you attacheds “df -kt” at boot and also after mounting with utility disk of G-Drive and pen drive Kingston

disk utility image is maked after a boot and, as writed, I see as external hd only the “My passport”

I maked procedure of unplug the cable fro iMac…but no solved

No modified! simply before update to 10.12.4 all OK! after... various problems! including the fact that for switch to "windows 10" with reboot with key “option“ to select windows disk, my iMac is freezing and i need to iMac “off” and “on” again with key “option"

Bye

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Answer 2

dot.com

Level 4

2,455 points

Apr 17, 2017 3:56 PM in response to bepino

How are you determining that the iMac does not see the external hard disks on your iMac?

I assume they are USB external drives, is that correct?

Do they have their own power supply plug into the wall outlet or are they powered by the USB connector?

If you open System Information (click on Apple icon at top left of screen and then hold down Option key and you will see "About this Mac" change to "System Information"). Once there, click on the USB item on the left in the Hardware section(just above the "Networks" item). Do you see the USB drive details listed in the main part of the window - you might need to scroll up to see them (should show you the manufacturer and model and size and file system type and lots of other bits of info?

If you go to a Terminal window (located in /Applications/Utilities) and type the command "diskutil list" what do you see (copy and paste the command and output to your reply)?

Good luck...

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Answer 3

bepino Author

Level 1

8 points

Apr 18, 2017 2:34 AM in response to dot.com

thanks for reply dot.com

see diskutil make with visible internal disks and only "My passport" (disk 7) external disk!

My complex :-) situation (but no problems before update to 10.12.4) is:

"G-DRIVE" (disk3) connected with thunderbolt port (NTFS for Windows);

"My passport" (for Mac storage) connected with second thunderbolt port, though thunderbolt to firewire adapter;

"My passport Studio" (for time machine) connected with above "my passport" through their FireWire ports;

"Elements" (NTFS for Windows) connected with USB 3.0 (though usb hub with their own power supply);

"Kingston" USB 3.0 pendrive (fat_32) connected wit iMac USB port.

tks for any help and regards

P.S.: I have another problem with 10.12.4... for switch to windows 10 with reboot with key "C" my iMac freezing and i need to iMac off and on again with key "c"

Last...sorry for my bad english!

Last login: Tue Apr 18 09:45:11 on console

bepino1:~ bepino1$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 121.0 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 648.3 GB disk1s2

3: Apple_Boot Recovery HD 650.1 MB disk1s3

4: Microsoft Basic Data BOOTCAMP 351.0 GB disk1s4

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +760.8 GB disk2

Logical Volume on disk0s2, disk1s2

B6FF652C-2553-4CCD-B8F2-285FB9CF51D9

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *3.0 TB disk3

1: Microsoft Reserved 134.2 MB disk3s1

2: Microsoft Basic Data G-Drive 3.0 TB disk3s2

/dev/disk4 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_partition_scheme *1.0 TB disk4

1: Apple_partition_map 32.3 KB disk4s1

2: Apple_Driver43 28.7 KB disk4s2

3: Apple_Driver43 28.7 KB disk4s3

4: Apple_Driver_ATA 28.7 KB disk4s4

5: Apple_Driver_ATA 28.7 KB disk4s5

6: Apple_FWDriver 262.1 KB disk4s6

7: Apple_Driver_IOKit 262.1 KB disk4s7

8: Apple_Patches 262.1 KB disk4s8

9: Apple_HFS My Passport Studio 1.0 TB disk4s10

/dev/disk5 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *1.0 TB disk5

1: Windows_NTFS Elements 1.0 TB disk5s1

/dev/disk6 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *62.1 GB disk6

1: Windows_FAT_32 KINGSTON 62.1 GB disk6s1

/dev/disk7 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *500.1 GB disk7

1: Windows_NTFS My passport 500.1 GB disk7s1

bepino1:~ bepino1$

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Answer 4

bepino Author

Level 1

8 points

Apr 18, 2017 5:24 AM in response to Luis Sequeira1

"So they appear if you do diskutil list?"

yes (see list)

"Where do they NOT appear? In the Finder?"

yes not appear in the Finder! but principally they are inactive! I need to activate with disk utility

"Did you check in Finder->Preferences->General, the box for "external disks"?"

yes is checked!

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Answer 5

Apr 18, 2017 6:25 AM in response to bepino

I have never heard of a drive appearing in Finder but being "inactive". If a drive shows up in the Finder then it is mounted, and nothing should be needed from disk utility. If, on the other hand, a drive is physically connected but not mounted, it would not appear in the Finder, and you'd have to use Disk Utility (or diskutil in the timeline) to mount it.

What is it exactly that does not work with the drive? Care to elaborate?

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Answer 6

bepino Author

Level 1

8 points

Apr 18, 2017 7:02 AM in response to Luis Sequeira1

if appear is active...infact after reboot now I see on the desk and I can normally use "My passport" external disk and "pendrive".

therefore the other external disks (G-DRIVE - "my passport studio" and "elements") are not visible and can not be used if I do not active with disk utility

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Answer 7

Apr 18, 2017 7:27 AM in response to bepino

Thank you for clarifying.

I see now that some of the drives do not automatically mount, and you have to mount them manually using Disk Utility.

I don't know why that is happening.

I can only suggest that you disconnect all external drives, reboot in Safe Mode, then reboot normally again.

Next, try again starting with all the drives connected and see if this changes anything.

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Answer 8

dot.com

Level 4

2,455 points

Apr 18, 2017 12:15 PM in response to bepino

Do you really want to see all the NTFS volume when running macOS or just when booted in Windows?

If you do want mounted in macOS, what NTFS software are you using to mount volumes (macOS can only mount NTFS volumes in read-only mode without other software)? Perhaps read-only mode in macOS is OK?

Also what does the Terminal command "df -kt" show?

Like Luis noted below when you posted the screenshot from Disk Utility, none of the drives are mounted when that screenshot was taken. So did you mount before you did the "diskutil list" command?

So, if you use Disk Utility to "eject" one of the unmounted volumes, then unplug the cable from the iMac and then plug the cable back into the iMac, does the volume automatically mount then?

Have you done anything with modifying the /etc/fstab file to change the normal automount behavior?

If not, please read this article to set up an auto mounting capability:

https://www.cnet.com/how-to/prevent-a-partition-from-mounting-in-os-x/

Ask questions if you need more assistance.

Good luck...

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