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

Based on what you said, I would investigate the cables and connections. Go through an elimination process to determine if the problems bad cable (more likely) or a bad input port (less likely). If your 1TB HDD has more than one connection capability, try them all.

Ciao.

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.

Having the EXACT same problem with a mid-2011 Mac Mini. 1TB Toshiba Canvio Basics won't mount. 1TB WD My Passport Essential SE works fine.

This problem with 1TB Toshiba external portable drives and newer Macs has been reported in other threads:

https://discussions.apple.com/thread/3510032

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. 😎

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

Using the MicroUSB Drive from my Jawbone Jambox worked! Disk Utility recognized it! (Running MacBook Pro 13" 2011 i5 2.4 GHz)

I can guarantee that these drives will work if you use a MICRO usb cable, it plugs into part of the weird proprietary connector that it uses (the part that's shaped like a micro usb, consequently). The cable to my Kindle did the job. Popped up and ran fine in usb 2.0 on my macbook air once I used that cable.

I am having the same problem; however, I'm not sure if I understand the "Micro USB" solution... Do I need to buy another cord to connect my Toshiba hard drive? If so, what exactly should I be looking for? Thanks!

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.

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

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.

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.