Yosemite cannot mount external disks

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Yosemite cannot mount external disks

Since I upgraded to Yosemite my IMAC does not mount external disks, even the bright new one I bought

I have also a Macbook Air that I upgraded to Yosemite and these same external disks can be mounted on the Macbook Air.

I have searched on the Apple support community and on the internet and quite some people whom upgraded to Yosemite have the same problem.

I checked the USB specs on both the IMAC and the MACbook Air

IMAC :

Hostcontroller : builtin userinterface

OS hostcontroller : AppleUSBEHCI

PCI- code : 0x3b34

PCI revision code : 0x0006

PCI factory code : 0x8086

Busnb : 0Xfd

MACBook Air:

Hostcontroller : builtin userinterface

OS hostcontroller : AppleUSBEHCI

PCI- code : 0x0d9d

PCI revision code: 0x00a2

PCI factory code : 0x10de

Bus Nb : 0x24

Needless to say that I need the data stored on the external disks.

Thks for helping me out.

iMac (27-inch Mid 2010), OS X Yosemite (10.10), External disks

Posted on Oct 29, 2014 1:25 PM

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Answer 1

pepe-it Author

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Oct 29, 2014 3:08 PM in response to pepe-it

I have found in the meantime a solution, in my case I have Seagate external drives.

I have downloaded the Paragon NTFS SW from te Seagate website .

I installed this sw and suddenly I could see and access the external disk.

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Answer 2

damon242

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Oct 29, 2014 4:41 PM in response to pepe-it

So I downloaded the Paragon driver as you suggested. I am able to see and access my 2 Seagate hard drives...BUT I cannot transfer a file from my Macintosh SSD hard drive to my Seagate. The Seagates are "read & write". Any suggestions?

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Answer 3

pepe-it Author

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Oct 30, 2014 1:18 PM in response to damon242

Sorry to read this. I have copied all my pictures to the External drive. Attached a copy of the windows (properties and the seagate drive)

On my Macbook Air I have also a SSD disk and the copies work here as well. Did you try to store an ew document on the external disk?

Success

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Answer 4

damon242

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Oct 30, 2014 2:16 PM in response to pepe-it

I have some files on my SSD drive I wanted to move to my Seagate but they will not transfer. I can open and/or play the files on the SSd drive so I know the file is good. They will not transfer to the Seagate.

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Answer 5

damon242

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Oct 30, 2014 2:21 PM in response to damon242

I have received the "Error Code -36" when trying to transfer timed out.

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Answer 6

pepe-it Author

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Oct 31, 2014 12:12 PM in response to damon242

I searched on the net and found following article :

http://blogs.discovermagazine.com/badastronomy/2008/03/30/mac-os-tip-for-error-c ode-36/#.VFPd3YezcpU

which explains that via the terminal app you can execute a Unix command to copy a file to the external drive.

once you have copied one file with the Unix command , you can copy files again via finder to the external drive.

I hope this helps.

succes

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Answer 7

Dec 11, 2014 12:14 AM in response to pepe-it

My macbook will no longer see any external USB drive or even the local Mac HD. All devices would fine on an older Mac that can t be upgraded,

Very annoying that this hasn't been dealt with by Apple

It seems that days of MACs just working is over.......

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Answer 8

damon242

Level 1

5 points

Dec 15, 2014 9:36 AM in response to pepe-it

I have read that if you turn Spotlight off you will have no problems. Open Spotlight, choose "privacy", click the "+" at the lower left and add what you do not Spotlight to search. Worked for me. I have 2 internal Seagates formatted OS X journaled in an external case. 🙂🙂

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