Question about Seagate FreeAgent Pro - 500GB, 7200 RPM, USB 2.0, eSATA, External 500 GB Hard Drive

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How do I format a Seagate 500 to work on a Mac?

I hooked up my Mac to the Seagate 500 and it did recognize the external drive, but when I went to transfer data to the Seagate it said it was not formated. How do I format it for a Mac?

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  • stefan400 Dec 28, 2007

    same trouble, seagate 320 drive

  • Anonymous Jan 05, 2009

    I bought a Seagate FreeAgent Go for PC, and I have a Mac. It didn't work out of the box. I looked all over to find a solution. MacNewbie's solution worked perfectly. Thanks. 

  • Anonymous Mar 28, 2009

    Hey, if i were to do this, would it erase all ym stuff i have on my freeagent that i saved when i had my pc, im trying to get it now to work with my mac and if i go through with this and reformat it, will it erase everything that is already on there?



  • Anonymous Apr 06, 2009

    I need to move many mac files to seagate. So, I need to format the drive to mac. help me

  • FrankMC May 04, 2009

    When doing this I just get 'cannot not unmount disk

  • Anonymous Mar 19, 2014

    Seagate at 90 per cent says to buy a new one. Cant afford a new one.

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I bought one of the Seagate FreeAgent 500 devices yesterday and followed the instructions on the back of the box: plug it in; let the Mac recognize it; go to the Disk Utility function (found in Applications > Utilities); select the Erase tab and check the box to re-format the FreeAgent to Mac OS Extended (Journaled) and choose a name for it.  Then proceed with the re-formatting.  It took only a few minutes but as soon as it was done, Time Machine (Leopard) kicked in and asked if I wanted it as my backup drive.  I said yes, and away it went.  Hope this helps.  By NewbieMacUserSept2007

Posted on Dec 29, 2007

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-Navigate to the computer's hard drive, then to the applications folder, then utilities, then disk utility. -Once in disk utility navigate to the partition tab and click it. -On the left on the window, under volume scheme, click the tab that says current, and slide down to select 1 partition. -Then click on the options tab below the partition window(before changing the partition, this button is not clickable). -Once you are there you will see the partition scheme that the drive defaults to which is called Master Boot Record. -A Mac user running a computer at 10.4 or higher should select GUID Partition table. -All others should select the Apple Partition Map. -After the proper selection is made, just click apply. -After all this is done, then you can navigate to the erase tab in the Disk Utility, but I am pretty sure you shouldn't need to.  It should be good to go! Hope this helps.

Posted on Jul 24, 2009

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I can't actually solve it but I've run into problems like this before where you need to somehow create a partition that is the correct capable size. Something about the bit number of the partition being a multiple of Four. Out of the box some are sizes that are not the right multiple. Just a thought.

Posted on Jan 04, 2009

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Dahsinapu's solution worked (after nothing else did). In Disk Utilty, instead of formatting the drive, choose a single partition, set to GUID (under options), and apply. :)

Posted on Jan 26, 2010

  • Andrew Nov 03, 2010

    awesome post killorbytes...you saved the day for me. I had a "pre-installed" Seagate 1.5TB and kept getting errors when I tried to erase. I followed your directions, went to "Partition" instead of "erase" and selected 1 partition, then "options" at the bottom, deselected the MS-DOS FAT and selected Mac OS Journaled with GUID. Worked like a champ. Thanks for the post!

    Andrew Hamilton
    Hamilton International Productionshttp://www.hiproductions.com

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As a combination of solutions #2 and #3, I had to partition my Seagate in two partitions to get it to format properly and avoid the problem of the multiple of four. Not sure if another way wouldn't have worked, but the partitioning works for how I use it, anyway.

Posted on Jan 16, 2010

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