usb3 drive disconnecting all the time at a usb 3 port on my macbook pro

If you are still in the 14 days from purchase period you can return your MBP 'no questions asked". I would take advantage of this in a discussion with a store manager citing the earlier promise and your needs for Mt. Lion. Perhaps you can have an exception made where they will move mountains and send you a MBP with Mt. Lion. If so, get it in writing.

Ciao,

Hi there,

In my late 2013 imac 27' I have exactly the same problem, my LaCie 2TB USB3 disk has been ejeceted randonly when using Mac OS X 10.9. I see on the net that there are many people with the same issue. I hope it get fixed with the first patch.

Cheers

Hello!

I have an iMac 27 "2013 OSX 10.9, I have the same problem with 3 USB 3.0 HD (WD, Segate, Samsung). The HD are ejected randomly and then are unreadable.

Connecting with USB 2 cable the problem does not occur.

There is absolutely need for a firmware update!!

😠

I am having a somewhat similar situation. Not with hard drives though. With external compact flash card readers. They keep disconnecting, they corrupt the pictures I cannot upload anything from them. Yet they work with the older system and pCs. The pictures aren't really corrupted. Only on Maverick.

For years I appreciate Apple for the reliability of its systems, but the silence on this issue is not acceptable!!!!

First of all, I would do as Ogelthorpe suggested, and return it, no questions asked, money returned.

If no luck, you have to check all applications that will not open: uninstall them and download latest version.

Also you may have some installs that are really wrong to have.

For us to have more information, download Etrecheck from www.etresoft.com and run it: it produces a list, that you can copy easily in a post here.

Then the USB3 problem: did you install any software that came with the external disks? If yes you must uninstall that: this generates issues already in older OSX, and certainly so in Mavericks. These softwares may be useful in a Windows installation but are better avoided in a Mac.

This USB3 issue is known in only a small percentage of new macs with mavericks, and I suppose there will be an update soon.

I don't use any third part software

Luke you can ride along here, but remember remarks directed to Apple will not arrive: only users to users here.

If your issues does not appear with the USB2 cable use that unitil we find the cause of the issue at hand.

I tried it with two different cables ...

advise me to call Apple support?

Does anybody has a solution yet?

It looks I have the same problem on my iMac 27"", just bought.

- Cannot format (with disk utility) a USB 3 external harddisk (WD red 2TB harddisk in a USB 3 case), connected to the USB 3 port, however could format bia the Apple-keyboard (USB 2).

- Looses connection while performing a backup (with Synchronise). Again, USB 2 no problem, but terrible slow.

However, I don't have any connectionproblems with my "WD MyBook 4 TB harddrive", which was pre-formatted by WD.

no, nothing new

as for my issue of card reader. no fix. i have to use image capture to retrieve pix from camera. NO readers will work with macbook pro15"

I just got a new IMAC and experienced the same issue with a RAID 10 array with 4 drives spontaneously disconnecting in the middle of a data transfer with the message "you should eject disk properly, etc. etc." message.

As many others I tried all the obvious solutions. Different cables, different drives, etc. Then I read something about radio wave interference from wireless keyboards. Well, I don't have wireless keyboards or mice (don't like them) but still, it stuck in the back of my mind.

I did find that a USB 2.0 cable with noise suppression dongles at each end worked just fine, if a bit slowly. Anyway, I found an old set of ferrite couplings that were made for video cables back in the day and placed one set at each end of the USB 3 cable. I then moved my RAID array as far from the computer as possible and plugged it all back in. The problem has not reoccurred even with the transfer of very large folders of files from a networked PC RAID.

Just a thought but it seems to have worked for me although the fact that this sort of thing is necessary does not speak well for Apple.

Same problems here. In combination with the smb problems on osx server my macmini has become useless. Need to reboot it twice a day to reconnect my HD. I'm already waiting months for a patch or update, plz apple don't ignore your customers!. Think this was my last mac.

Btw never had any problems with my old macmini and usb 2 disk.