Encrypt an external hard drive

I used my Mac in an attempt to quantify an external HDD WD Passport 500 but got an error message stating that she was unable to continue because there was no Guide Partition. Is this in any way about this?

Sure.  Repartition the disk with a GUID partituion.  If you want to keep the data on the disk, you should save up to another storage device.

Applications-> utilities-> disk-> Partition-> Options utility should... give you the choice to specify the format of partition table.  It should say GUID, or perhaps of TPG.  It's been a while since I saw a Lion 10.7 disk utility interface, so I work for most of the memory.

Yet once, Re-partitioning the drive will erase everything on the drive.  If you want the data on that disk, you must back up the data to another device before changing the type of partition table.

Tags: Mac OS & System Software

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