My Toshiba external hard drive is no longer being recognised by my Macbook Air - solution?

My Toshiba external hard drive is no longer being recognised by my Macbook Air. The light on the hard drive is on, but it won't appear on my computer's desktop or anywhere else. How can I fix this?

Hi rivraff,
If you are having issues mounting an external hard drive volume, you may want to see if it shows up and/or can be repaired in Disk Utility; you may find the following article helpful:
Apple Support: Using Disk Utility to verify or repair disks
http://support.apple.com/kb/ht1782
Regards,
- Brenden

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see all about it here:
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I have a Lacie external hard drive (LaCie Rugged XL eSATA 3Gb/s | USB 2.0) that I have been using on my MacBook (timemachine) (late 2008, 2.4 GHz Intel Core 2 Duo with OS X 10.9.1). One day it stopped being recognized, not showing up on the desk top, the disk utility program, etc.
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speachmusic wrote:
if I ran an eithernet cable through my flat
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New hard drives out of box should be formatted for your Mac
go to DISK UTILITY and verify what it says your HD is formatted as under the "ERASE" tab
HFS+ above is the "mac format"
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FORMAT TYPES
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Maximum file size: 4GB.
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NTFS (Windows NT File System)
Read/Write NTFS from native Windows.
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For Mac OS X 10.4 or later (32 or 64-bit), install Paragon (approx $20) (Best Choice for Lion)
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Maximum volume size: 8EiB
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natgray17 wrote:
I don't know about your first question... I went to finder, preferences, then general but I didn't see anything for the hard drive.
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Nope, disk utility cannot see it. I've tried unplugging it and plugging it back in but it still won't recognize it.puter that's a Mac...
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What do you mean from a Windows machine? It's a Toshiba hard drive and I put my music on it from my home computer that's a Mac...
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Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
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1-Repair permissions and restart your computer.
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My Toshiba external hard drive is no longer being recognised by my Macbook Air - solution?

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