How to Format an External Drive for Mac Compatibility

If you format a hard drive it erases the data on it. That is what formatting does, it erases a drive. What else do you think erasing a drive is supposed to do except erase the data?

How to Format or Partition an External Hard Drive for Mac

I purchased a 4TB WD external drive and having a heck of a time reformatting this drive. I have tried all the above advice without getting to have this new hard drive formatted. Any other suggestions? I just keep getting the error Disk erase failed.

There must be something new with High Sierra Is there an option besides just declaring the data irretrievable, and more importantly, how does a USB uninitialize itself? Will I be able to copy and share media across both Mac and Windows? I am Computer-Eleteret lol.

Now My Mac is about There. I just have no Clue how to do it.

Here's how to format USB on Mac

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How to format a USB drive on Mac

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February 23, at Rochelle says: February 25, at 8: SB says: March 16, at 7: Before you begin to use your new external hard drive with Aperture, reformat it to the Mac OS Extended file system:. Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement.


  1. How to Format an External Drive to Work with Mac (from NTFS to Mac OS Extended)?;
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  4. Format external drives to Mac OS Extended before using with Aperture!
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  2. How to format a USB drive on a Mac;
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How to Format External Hard Drive for Mac & Windows (MS-Dos or ExFat?)

Open Menu Close Menu Apple. Format external drives to Mac OS Extended before using with Aperture Tips on preparing a new external hard drive for use with Aperture. Before you begin to use your new external hard drive with Aperture, reformat it to the Mac OS Extended file system: Be sure your drive is attached and mounted.

If you have already written any data to the drive, back it up before proceeding to the next step.