Upgrade to Mavericks does not allow connection to my Lacie external hard drive

I have done the first (SMC) but not the PRAM. Can you provide instructions please? Thank you!

I have the NAS setup fine with Mavericks.

To get TM to work properly, make sure you connect using afp://xxx/xxx/xxx/xxx & select the drive in TM preferences that shows the IP address of the unit and not the NAS name. If you have it set to the unit's name, it will not connect properly, for reasons I don't know.

I've never had any problems with SMB either. I simply use Finder, Connect to... smb://xxx.xxx.xxx.xxx Allowing it to connect, the shares on the drive should open in Finder. And the drives should mount on your desktop, provided you have that enabled in Finder preferences. To auto connect on boot, simply drag the mounted drives into your User Accounts, Login Items, within System Prefs.

I do not and have never used any of LaCie's proprietary software.

I hope some of that helps you out.

Reset PRAM instructions are here: http://support.apple.com/kb/ht1379

Restart the computer holding down the command - option/alt - P - R keys before the gray screen appears. Continue to hold until you hear the startup chime for the second time.

Reset NVRAM/PRAM

I can't believe the amount of misleading "advice" I am reading on this forum. I have precisely the same problem (except that I have a Hitachi Travelstar 250GB). It stopped working with Mac OSX the day I upgraded to Mavericks (worked fine with Mountain Lion).

https://discussions.apple.com/thread/5953119

This drive is currently inaccessible from Mavericks (the LED lights up but no disk activity occurs and Disk Utility shows nothing). It works perfectly well with my old Snow Leopard machine, the latest Ubuntu installation on my desktop and a friend's Windows 8 machine.

The problem is inescapably Mavericks. Nothing else. Period.

Unhepfully telling people to suspect hardware issues when the problem so clearly started with an OS upgrade and doing the OSX version of Windows-droids' "reboot and pray" dance is wrong.

Put bluntly, an Apple software engineer messed up the USB mass-storage code (the less charitable version of this involves forced obsolescence in cahoots with hardware manufacturers), and we are expected to pay for that nonsense.

Isn't the first time and won't be the last time, but be honest for heaven's sake.

As per the response above.

It is a USB issue with Mavericks

I spent along time on phone with tech support last night and it is being reffered to the engineers

@MacSingh

Yep exactly the issue, Problem with Lacie and a seagate GoFlex connecting via USB A to USB A.

It works with a USB A to USB B cable bizarrely. And via network connection.

Just the USB A is screwed.

Am awaiting for the engineers to respond early next week

If this is a completely a Mavericks issue, every Mac user with external hard drives connected to their Macs would be experincing this issue.

I am not having any issues with normal (not NAS drives) external hard drives. Many more user are not having issues, either.

The only users having issues are those who post to these types a various Mac troubleshooting forums.

And the users having issues represent a minority of users having issues.

As I have stated, recently, I have 3 Multi protocol connection LaCie drives that were purchased at different years and all of my drives are functioning fine on Mavericks. My most recent LaCie drive is only a year or so old and this is the drive I boot from and run Mavericks off of.

So, clearly it is not solely a Mavericks issue.

Thank you Eric Root! That is exactly what they did when I took my macbookpro to the genius bar today.

MichelPM- the apple store agreed that it is a problem with Mavericks with the usb code to the external hard drives. My LaCie external drive that has always worked with firewire or usb a, will no longer mount or be visible in disk utility when connected via those means. However, like the user above, the Apple store tech was able to connect my drive usb A to usb B and VIOLA! the drive was mounted!!!! Praise God! I am backing it all up with TM now to another external HD as my primary copy of iPhoto (225GB) was on my LaCie (as my mbookpro is only a 500GB...need to get a bigger HD! That is step 2!).

Thank you everyone for your assistance!

Well,

It must only be affecting certain model Macs running Mavericks as, clearly, I am not having any issues with my standard LaCie external drives and I am currently up to date, running OS X 10.9.2 on a late 2009, 27 inch screen iMac.

FYI, from

http://en.wikipedia.org/wiki/USB

"A" & "B" connectors[edit]

The standard connectors were deliberately intended to enforce the directedtopology of a USB network: type A connectors on host devices that supply power and type B connectors on target devices that receive power. This is intended to prevent users from accidentally connecting two USB power supplies to each other, which could lead to dangerously high currents, circuit failures, or even fire. USB does not support cyclic networks and the standard connectors from incompatible USB devices are themselves incompatible.^[4]

Thanks, Eric Root. Rootin for Root!

ZAP the PRAM - worked for me.

Since the Mavericks install I'd been getting a dialog box on startup, saying the computer didn't recognize (unnamed) disk, with Eject and Cancel. I zapped the PRAM and my LaCie external "2big triple (button)" hard drive mounted right up. It's been trouble-free for 5-6 years.