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I purchased a new PNY Turbo 3.0 128 GB Flash Drive, formatted it as Mac OSX Journaled, transferred files to it, encrypted it, used it for about 30 minutes on my iMac, then it disappeared while navigating in Finder. The flash drive does not show in Finder, Disk Utilities, or System Information.

Yes, show external drives is checked in Finder Preferences. The USB is recognized in an older Macbook using a much older OS, although I can't view the contents and a message on the Macbook says that I need to put the drive into a device with an updated Mac OS. No other user accounts on my iMac can view the flash drive. So far I have done n umerous restarts, shutdowns, and remounts, reinstalled Mavericks (again), repaired disk permissions, etc. This is the second issue I've had with an Apple formatted and encryped flash drive disappearing. I've put an entire Sunday afternoon reading through threads and troublshooting this, and looks like some people just accept it as another thing that doesn't work on their Mac or go try different brands of flash drives until one works.

Suggestions or recommendations anyone? Funny Names For Crack Pipes Burns. I would like to keep this flash drive (it does have the Mac symbol on the packaging) if possible. IMac, OS X Mavericks (10.9.3) Posted on Jun 8, 2014 7:57 PM. How did you encrypt it? I assume it was a case of right clicking & selecting encrypt so that Disk Utility did it for you? This is using Apple's Filevault, but it is only supported on certain OS X versions as you are finding out.

Do you have any backups of the encrypted contents? You can't rely on the Finder showing connected disks, open Disk Utility (from Applications/Utilities/) and see if you can see the USB device listed in the sidebar. If it is there select the disk & try mounting it.

You may also want to try mounting the partition (below the disk). If the disk doesn't work on 10.9 I'd consider erasing it and starting afresh. Avira Free Antivirus Eng 2012 Olympic Gymnastics.

That is assuming it is visible in Disk Utility. If you start over reformat the disk & select the 'Mac OS Extended (Journaled, Encrypted)' for the format. This will encrypt before you use the disk which may work better than encrypting 'in place'. Failing that I would erase on 10.whatever & start again on 10.9. Finally if it doesn't want to erase or appear at all I'd consider returning it, sometimes things just inexplicably die when they are new. Another option is Truecrypt, which is multiplatform & supports older OS X versions.

However the developers recently gave up developing it & started putting out scary messages. It may still be OK if you can use the version before 7.2 (it's too much politics to explain). Jun 9, 2014 6:45 PM. Thanks for the reply. Yes, I encrypted it in Finder by right clicking the flash drive and selecting Encrypt 'PNY Flash Drive.' Yes, I have the original flash drive that I transferred the contents from.