Q: MacBook Pro (Retina 13in Mid 14) USB issue with Sierra

All,

I've a MacBook Pro (Retina, 13-inch, Mid 2014) with Sierra just installed.

All usb devices are not accessible after I try to access them through finder, basically it looks like system unmount them right after I try to access. From that moment on they are no more visible in finder or possible to mount.

In an older Mac pro with Sierra (mid 2010) and on Ubuntu and Microsoft platforms all devices are visible.

I would also like to signal that my iPAD is visible and accessible if connected. So it means that the problem is related to all USB devices not belonging somehow to Apple.

Below I list the several test I did and related results:

1. SMC reset - same result as described above

2. boot in safe mode: USB visible and accessible

2a. Disk Utility mount: it fails, device visible but no mount.

3. here the devices list

HAS1GL026-LTM:~ solerb$ diskutil list

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *500.3 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage Macintosh HD            499.4 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.1 MB   disk0s3

/dev/disk1 (internal, virtual):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                            Macintosh HD           +499.1 GB   disk1

                                 Logical Volume on disk0s2

                                 EBE4ABE6-750D-4D9D-9A13-6897F621CC99

                                 Unlocked Encrypted

/dev/disk2 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     FDisk_partition_scheme                        *15.5 GB    disk2

   1:                  Apple_HFS Install OS X El Capitan 15.5 GB    disk2s1

/dev/disk3 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *2.0 GB     disk3

   1:       Microsoft Basic Data UNTITLED                2.0 GB     disk3s1

4. Here the USB device tree from "system information"

USB 3.0 Bus:

USB 3.0 Bus:

  Host Controller Driver: AppleUSBXHCILPT

  PCI Device ID: 0x9c31

  PCI Revision ID: 0x0004

  PCI Vendor ID: 0x8086

Apple Internal Keyboard / Trackpad:

  Product ID: 0x025a

  Vendor ID: 0x05ac  (Apple Inc.)

  Version: 2.24

  Speed: Up to 12 Mb/sec

  Manufacturer: Apple Inc.

  Location ID: 0x14400000 / 2

  Current Available (mA): 500

  Current Required (mA): 40

  Extra Operating Current (mA): 0

  Built-In: Yes

BRCM20702 Hub:

  Product ID: 0x4500

  Vendor ID: 0x0a5c  (Broadcom Corp.)

  Version: 1.00

  Speed: Up to 12 Mb/sec

  Manufacturer: Apple Inc.

  Location ID: 0x14300000 / 4

  Current Available (mA): 500

  Current Required (mA): 94

  Extra Operating Current (mA): 0

  Built-In: Yes

Bluetooth USB Host Controller:

  Product ID: 0x8289

  Vendor ID: 0x05ac  (Apple Inc.)

  Version: 1.26

  Speed: Up to 12 Mb/sec

  Manufacturer: Apple Inc.

  Location ID: 0x14330000 / 6

  Current Available (mA): 500

  Current Required (mA): 0

  Extra Operating Current (mA): 0

  Built-In: Yes

Flash Disk:

  Product ID: 0x1000

  Vendor ID: 0x090c  (Silicon Motion, Inc. - Taiwan)

  Version: 11.00

  Serial Number: FBF1008180007880

  Speed: Up to 480 Mb/sec

  Manufacturer: USB

  Location ID: 0x14200000 / 14

  Current Available (mA): 500

  Current Required (mA): 500

  Extra Operating Current (mA): 0

  Media:

Flash Disk:

  Capacity: 2 GB (2.004.877.312 bytes)

  Removable Media: No

  BSD Name: disk3

  Logical Unit: 0

  Partition Map Type: GPT (GUID Partition Table)

  USB Interface: 0

  Volumes:

UNTITLED:

  Capacity: 2 GB (2.002.780.160 bytes)

  File System: MS-DOS

  BSD Name: disk3s1

  Content: Microsoft Basic Data

  Volume UUID: CD86F9C6-FF60-3972-8BB5-965C188DF621

Cruzer Glide:

  Product ID: 0x5575

  Vendor ID: 0x0781  (SanDisk Corporation)

  Version: 1.27

  Serial Number: 200435129311B43209ED

  Speed: Up to 480 Mb/sec

  Manufacturer: SanDisk

  Location ID: 0x14100000 / 26

  Current Available (mA): 500

  Current Required (mA): 200

  Extra Operating Current (mA): 0

  Media:

Cruzer Glide:

  Capacity: 15,52 GB (15.522.070.528 bytes)

  Removable Media: Yes

  BSD Name: disk2

  Logical Unit: 0

  Partition Map Type: MBR (Master Boot Record)

  USB Interface: 0

  Volumes:

Install OS X El Capitan:

  Capacity: 15,52 GB (15.522.069.504 bytes)

  File System: HFS+

  BSD Name: disk2s1

  Content: Apple_HFS

  Volume UUID: FCBC00D6-5BF8-39E5-B2A3-88677C0DF606

5. here the result when I try to mount through terminal

HAS1GL026-LTM:~ solerb$ diskutil mount /dev/disk3s1

Volume on disk3s1 failed to mount

If the volume is damaged, try the "readOnly" option

Appreciated your help

thanks

Bruno