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Why won't my new hard drive mount on my new MacBook Pro but will mount on my old MacBook Pro

I bought a new MacBook Pro to replace an older MacBook Pro. I also bought a new Toshiba 1T portable hardrive to backup my new computer. The Toshiba hard drive will not mount on the new computer, but it will mount on my old computer.


However, I have two other portable hard drives (320 MB and 500 MB) that do mount on the new computer. I am puzzled as to why the new MBP will not display my Toshiba 1T portable HD.


Any ideas?

Posted on Nov 26, 2011 10:16 PM

Reply
30 replies

Nov 28, 2011 9:01 AM in response to OGELTHORPE

Thanks, for the reply. The 1TB HDD mounts on my other MacBook pro and iMac machines without a problem, so it can't be the cable. It must be a bad input port or a software problem. The strange thing is that all of my other external hard drives mount perfectly on the new MacBook Pro. Only the 1TB HDD will not mount on the MacBook Pro, but the 1TB HDD DOES mount on my other computers.

Nov 29, 2011 11:11 AM in response to panaca

I have 3 Toshibas in my inventory all which my MBPs recognize, so it certainly is not the manufacturer. The only other thoughts that come to mind are, do the specs meet the MBP requirements? I know that some HDDs have their own sudden motion sensors which are incompatible with the Apple SMS built in a MBP.


Some vendors have technical types in house, like OWC and Newegg. I would contact them and see if they can assist you. Sorry, but I'm at wits end. Perhaps some more knowledgeable person will read your post and offer you solution. Good luck.


Ciao.

Dec 2, 2011 1:16 PM in response to panaca

I don't think its Lion. I'm thinking its the newer MACS themeselves. I have a May 2009 15" Macbook Pro and it works. When I intially hooked it up I did not see it on my desktop/finder. But it showed up when I ran Disk Utility. I eventually just swapped out my old HD with this one, and when booting to install LION, I ran Disk Utility, format/partion and then installed, restored Time Machine Backup with no issues. So far everything in running smooth. 😎

Dec 2, 2011 2:34 PM in response to ALG20

I can confirm that the drive works well on a two year old MBP running a clean install of Lion, but the drive will NOT mount on a new MBP that was shipped with Lion. The drive also mounted and worked well on a three-year old iMac with a clean installed version of Lion. Thus I conclude that it is a hardware problem with my new MBP.

Dec 12, 2011 4:11 AM in response to panaca

I used a micro, not mini, a micro USB connector on one side of the connector on the drive and my Macbook Pro (2011) recognized the drive and reformatted it for Time Machine. Prior to that the drive (brand new Toshiba Canvio 1TB USB 3.0 and 2.0) didn't show on the Macbook but did immediately show on a older Windows machine

Dec 30, 2011 6:08 PM in response to esouth

esouth, you have extremely high odds of being able to use the drive if you connect it with the same type of cable used by Kindles, Nooks, or new (non-Apple) smartphones - a cable is a micro USB connector on one end (for the hard drive) and a standard USB connector on the other to connect to the computer. Look closely at the connector on the hard drive, on the left side is a receptacle that exactly matches the micro connector. The receptacle on the right is for the added data connections used in USB 3.0 to get a faster transfer rate. If you connect only the 2.0 side, it works. The good news is that micro USB cables are low cost and very plentiful. Be sure you get one that is good for both data and power - some of the earlier ones served only to charge phones and didn't have all connections wired, probably to save money.

Jan 3, 2012 5:08 PM in response to panaca

The only way I could get my Toshiba 1 TB USB 3.0 drive to work was to buy this cable from Amazon: http://www.amazon.com/gp/product/B005M0ICG2/ref=oh_o05_s00_i00_details


I tried a Kindle cable, I also ordered a thick data / power cable and it would not work. So I tried this dual USB cable and my drive is working great now.


You may be able to find it else were but the bottom line is you have to use both USB ports on your MacBook in order for this drive to work. I'm using a late 2011 MacBook Pro.


SyN

Jan 3, 2012 5:42 PM in response to sYnDr

Okay, I may be wrong here and it is a power issue. Not sure why, but multiple other people (including me) are getting it working using a micro USB connector. If you had a good cable, plugged it into the correct side of the drive, and the drive didn't work, then the drive does need something more in terms of power. Although I don't understand the reason for the different results.

Jan 24, 2012 5:28 AM in response to panaca

New external Toshiba 1TB hard drive. Running Lion on a 2011 MBP. Same issues as everyone else. I tried formatting on an older PC I have, nothing, nothing, spent hours trying to get it to recognize the drive at all on my MBP. Finally tried using my Android EVO phone adapter instead of the usb plug it came with and it worked immediatly. The EVO adapter (runs from phone into a USB) is much smaller than the one that came with the charger (I guess thats a mini) but doesn't seem to matter. I had to format it on the PC to exFAT - once it recognized the drive on my MBP it still wouldnt let me write to it - exFAT seemed to fix that problem.


In short - the problem seems to be the USB, not the charger.

Why won't my new hard drive mount on my new MacBook Pro but will mount on my old MacBook Pro

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