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namstech, Electrical Engineer
Category: Mac
Satisfied Customers: 2126
Experience:  M.S. Signals and Information Processing
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I have a Iomega Prestige 500 GB USB 2.0 Desktop External Hard

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I have a "Iomega Prestige 500 GB USB 2.0 Desktop External Hard Drive 34270, bought from Amazon. It worked fine on my Windows system, but now I want to use it on a Mac OS 10.4.11 System. But I get READ ONLY... How do I unlock it? Ken Benson ([email protected])

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Please refer to this article for solution to your problem.

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namstech, Electrical Engineer
Category: Mac
Satisfied Customers: 2126
Experience: M.S. Signals and Information Processing
namstech and 3 other Mac Specialists are ready to help you
Hi I am Ashik. I think i can help you

Windows uses NTFS Partition and Mac can only read it and cannot write to it. If you want to use that hard disk with your Mac, you can format it as a Mac partition

Before formatting, Copy all the files from your hard disk to your Mac first or you'll lose your files.
  • Goto Macintosh HD/Applications/Utilities/ and open Disk utility
  • Now connect your hard drive into your Mac
  • Select the External Hard Disk that at the left column
  • Click on the Erase tab
  • At the “Volume Format” select “Mac OS Journaled/Extended”
  • If you confirm to format your hard disk, Click on “Erase” button.
  • If the erase process finished, your external hard disk is ready to use for your Mac.
  • Copy all the files back to your Mac (optional)

(Note : Once you formatted the hard disk for Mac, your Windows cannot read it unless your format it again as NTFS)

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