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

I had similar problem with my iomega portable drive but it appears to be a simple USB connector/port problem.

My MacBook Air does not recognize the drive if I push USB connector all the way in but it works fine if I plug it in about half way. Maybe not the same problem described in this thread, but just want to chip in that it could a simple USB port/connector problem that you open/close on the macbook air.

PKdunn,

The USB connectors are made so that the ground connections/stripes on the connector are longer and are the first to contact. You can see this when you look into the connector ends. So when you get results like you reported (succes when only partly inserting the connector), I wonder if you're not fully connecting on the USB 3 data side, but the USB 2.0 micro connector portion (which carries the power and has lower data rate connections) is fully connected. Have you tried using just a micro connector?

My Friend

Also I bought a 1TB Toshiba external HDD but my MBP with Lion OSX not support up to 500mA external hard drives and mine was need 1000mA

So I think that is the problem.

The Toshiba drive and MBPs both are supposed to be compatible with USB 2.0, which means the Toshiba shouldn't need more than 500mA and the MBPS should provide it. I don't know why the drive asks for more unless it always thinks it's in a 3.0 mode. Mine runs ok using a connector that's only for 2.0

I'm having the same problem with the 750 GB using the USB 3.0 cable supplied. Does not mount plugged into the MBP side ports. I have a Belkin powered USB hub. I then plug into the powered hub and it boots up fine and the mac see's it. I then eject it and plug it into the port on the keyboard (which is plugged into the MBP port) Boots up and the mac see's it. This is annoying. I travel for my job about every 6 weeks. I have the latest 15" i7 MBP. I'm starting to agree with MBP port issue with USB3.0.

I have a Gearhead four port powered hub that did the trick for me, as well. The micro-usb from my Evo didn't work, plugging in halfway didn't work, but this one finally got it running for me. Leads me to believe it is the drive that is asking for more power than the USB is pushing until using a powered USB hub. *edit* Late 2011 MPB, 15" and it's a 2.0 hub, if that really means anything, btw.

This is the most insane thing I've seen for a long, long while. Obviously, since I'm here reading this, I'm having problems with my new 1TB Toshiba drive. It works fine on my iMac. Got a new Macbook Pro. Light on the drive stays blue, vice white. I was impressed and thought that the USB 3 mode. Got ready for some crazy data transfer speeds! Drive never shows up.

Anyway, saw the Kindle cable comment, tried it, worked like a champ! USB2! Yay! Glad to get the drive to work, ticked off that I paid for USB3 functionality in my Drive and in my Macbook Pro, but someone's dropped the ball. Toshiba? Apple? Hmmmmmm.

Kindle cable ftw!

Hi Guys

could I just jump in with similar experience, I have an older 2008 iMac, done all the Lion/ML upgrades, that's a whole other forum discussion, but my Toshiba 1 TB USB 3.0 drive was all ok till the Lion upgrades, then little by little these weird glitches, my issue has been permissions, the drive looking me out from opening iPhoto libraries and Dreamweaver files, I notice that other people were saying to get a MicroUSB lead etc, but this is all mine is shipped with, so it sounds like a Y adapter is the go. I have 2 Seagate drives that run faultlessly.

Could someone here suggest if what I am doing is a problem long term:

I work off files on this drive, eg Dreamweaver, iPhoto, and Photoshop files, working on them and storing them as well.

Am I demanding too much from the drive? should it's function be more to store to ie Read and write as a back up device.

Hi there

I have has stuck erstwhile with my USB3 external HDD, the USB power-up hub figure out the issue, just spend a couple of dollars to buy this tiny device.

I had same problem with a Toshiba Canvio External 1TB drive, 2.5 USB 3.0. I SOLVED using a usb 2.0 extension of about 1ft.

Plcosta,

I tried my USB 2.0 etension (3ft.) and now it works!!!

Thanks !!!

I am having a similar problem. I have a Seagate external HD. The external HD is running linux. My brand new Macbook Pro is running Mountain Lion. On my previous mac, I was running an older operating system. Snow Leopard I believe. When I plugged in the external linux HD, it would be detected and mount. When I plug in the HD to my new computer, a popup reads "The disk you inserted was not readable by this computer. I have the option to initiatize, ignore, or eject. If I choose initialize or ignore, nothing happens and the disc won't mount. It is detected by the disk utility app, but it won't allow me to repair or verify disk permissions or mount the disk. I've already tried resetting PRAM and SMC. Is there any other way for this linux HD to be detected? THanks.

Your problem is completely different. OS X doesn't have built-in support for ext3/ext4 disks, which is the native file system for Linux. Start a new topic.

wowwww...why did I just pay like 2000 bux for a new MBP when i cant even use a USB 3.0 drive. ***!! im furious. I know the ports are USB 3.0...i just bought this brand new today. Unreal. Bur thanks for the tip at least my extender 2.0 cable works

THANK YOU!!!! plcosta's idea solves my problem too. Frist, I tought it is a problem with Tuxera NTFS (because of tuxera error message - I have a NTFS USB3.0 disk from PWX (Toshiba)). But now I tried with an extension and it works. THANKS A LOT -- I was searching for 1 week and also a technical support call with Apple could not help.

Very happy! 🙂🙂🙂