USB Flash Drive Not Mounting After Mavericks Update

yeah, that's what i was afraid of. that app didn't work. unless there's something else i'm supposed to do? all I did was install the trial, reboot the computer, and checked the settings in system preferences. but the thumb drive still does not show in disk utilities or even in paragon ntfs. so, i'm not sure what else to do.

I have the exact same problem, MBP late 2011. Since upgrading to Mavericks, my SanDisk Cruzer 16GB will not mount anymore. Moreover, my Epson P-3000 image tank does not mount anymore, and my digital camera does not mount anymore. Other thumb drives mount fine. The SanDisk shows up on the iMac we have, and I -- since it contains an install disk for Mavericks -- I can(!) boot from it. This means that the thumb drive is fine, but only after starting my installed Mavericks version, it is somehow disabled.

I did reinstall the OS, clean install. Then all is fine. However, after copying Network Settings from the previous install through Time Machine, the USB devices don't mount anymore. So, reinstalled Mavericks again -- clean install -- and transferred all but Network Settings from my previous install via Time Machine. That worked fine, the USB drives did mount...... for some time. As of yesterday, I noticed that my drives do not mount anymore.....

Therefore, it definitely is a software problem that stems from Mavericks.

By, "I can(!) boot from it", I mean with the MBP even. So before the OS is running, the MBP does see the USB thumb drive.

I was having similar symptoms with a USB hard drive--worked fine before mavericks update, didn't mount afterwards. Also wouldn't show up in disk utility.

On a lark, I booted the computer into the recovery partition, then launched disk utility. The USB drive showed up in disk utility when the computer was booted into the recovery partition. I clicked "verify disk", the result was OK, so I re-booted into Mavericks and now the USB drive mounts just fine.

Hope this helps someone else, though who knows--maybe it was something unrelated that finally made things work.

I had the same problem. Research hinted that I might see my flashdrive on my desktop. I did. Then I clicked on "Finder" and clicked and dragged the flashdrive icon from my desktop to the "Finder" menu just under the Macintosh HD line. I then "ejected" the icon and removed and replaced the flashdrive, and it reappeared in the "Finder" menu where I had placed it. I hope this helps.

Hi,

Solved!

I had the same problem and I got this simple solution.

Before the Mavericks update I had to use MacFuse and NTFS-3G to mount my external hard drive.

After the Mavericks update, my MBP doesnt detect my external hard drive anymore.

So I unplugged my external drive from USB port. Then go to: System Preferences --> NTFS-3G --> Click "disable" NTFS-3G.

Connect your external hard drive. Be happy!

Nope. I never used NTFS-3G. I cannot disable it in System preferences.

It is not only NTFS drives that don't work with Mavericks. Also a Mavericks installation bootable USB drive is not recognised, but it does make the Macbook Pro boot and install. That's is outside Mavericks.

Once Mavericks is up and running, bye bye USB drives.

Solved! Solved! Solved! Solved! Solved!

Thanks AndréBatista

I had the same problem and your solution worked for me, even though I had a slightly different program

Solved!

So I unplugged my external drive from USB port. Then go to: System Preferences --> Tuxera NTFS --> Click "disable" NTFS Tuxera.

I Connected my external hard drive and was happy to know that your fix worked!!!

your solution worked fine for me!! i can now see my drive but i cant write to it. Any solution for that?

your solution worked fine for me!! i can now see my drive but i cant write to it. Any solution for that?

Hi edem_kofi

Uninstall NTFS-3G.

Install NTFS-3G again but without MacFuse.

Install oxsfuse with option Macfuse layer enabled.

Instal fuse wait.

Or follow this instructions http://www.macbreaker.com/2012/02/enable-write-for-ntfs-hard-drives-on.html

Best regards!

I was hopeful this would work for me but it is not an option to Disable Tuxera. Since Apple doesn't seem to be offering any solutions maybe the store can roll back the "upgrade". What a total nightmare.

Halavista's solution worked perfectly, thanks!!!

Just for the record,

Here was the problem:

I had 2 USB flash disks (both FAT32 formatted) and also tried a friend's windows USB disk, which would not mount properly (seemingly only after OS X 10.9 "Mavericks" update). They'd show up in the sidebar & in my disks list (and in Disk Utility), but if I tried to open them in Finder, the window would briefly flash something like contents but go back to the previous screen - I could not view/edit the contents of the disk.

Disk Utility could Unmount & Mount the disks, but that wouldn't alleviate the problem (and would fail upon Varify/Repair with "could not unmount."). The disk's root folder would also show up in Terminal /Volumes/, but attempts to copy files via terminal were met with strange results such as "The file xzyabc already exists.", with the file having Not been copied when viewed on another computer. Various methods of Reformatting (always FAT32, since I was transferring to Windoze) also did not solve the problem.

As halavista said, this solved my problem:

I followed the instructions here to reset the System Management Controller (SMC):

http://support.apple.com/kb/HT3964

Note that the only indication that the SMC reset occurred is given in this hint:

https://discussions.apple.com/thread/4615991 -- the magsafe power adapter LED may blink. I'm not sure if mine did, I wasn't watching it at the time.

After booting back up, both of my USB flash drives are acting normally - I can read & write them, eject/re-mount and see the new contents.

Maybe the Apple SMC article should list this USB drive issue as another reason to reset the SMC.

(Aside; The SMC article says that this would also solve the fans spinning up to full blast - which my computer started doing recently. The SMC reset does Not appear to have stopped that.)

My specs: MacBook Pro 2.8 GhZ Intel Core i7 // Mac OS X 10.9.2