Macpro 2013 late update 10.10.2 make problem with thunderbolt drive

If they have tried the Beta they can't discuss it in this public forum.

Same problem over here.

Unmount LaCie 3 TB external Thunderbolt drive via Finder ("eject".) Everything looks well, the LaCie Icons disappear.

Then powering off the LaCie drive, and the iMac 5k instantly crashes. Since OSX 10.10.2.

Thank's for your testimony , idem on the 5k.. The problem is only 10.10.2

I hope Apple will release a fix in the next update ( quickly i hope 🙂 )

So, Apple confirmed the bug and has a workaround.

After 3 friendly 1st Level Support men (Apple Germany) , who could not really help, I reached a very friendly and competent Lady from 2nd level support on telephone. She studied this discussion forum for a while, checked her database and then confirmed the bug. It is in OSX 10.10.2 as we supposed, the engineering team knows of it and it will be fixed. She could not assure that it will be fixed already in OSX 10.10.3, but they are definitively working on it.

Meanwhile she has a workaround: Eject the external Thunderbolt drive in the Finder (right- mouse click, eject), as we all do. Now it is safe to pull the Thunderbolt cable and disconnect the drive. This will be survived by the Mac. And now it is obviously safe to turn off the completely electrically disconnectet drive without crashing the Mac.

HTH

Joachim Neudert, Herrsching, Germany.

Ever since either the 10.10.1 or 10.10.2 update, every time I try to transfer files to my Lacie Little BigDisk Thunderbolt 2 Raid SSD the drive ejects itself. For some reason the drive loses the bus connection or loses the power to the drive via thunderbolt 2. I contacted Lacie because I thought the drive was starting to fail so they sent me a new drive and the same issue is happening with the new drive. This occurs on my Late 2013 MacPro and my Mid 2014 Retina MacBook Pro. This only happens with the thunderbolt 2 drive. My other Thunderbolt 1 drives or USB3 drives don't have these issues. This started happening about 1 to 1-1/2 months ago. don't know the exact date but surly after one of the OSX updates because this issue was not present before. So again this happens with two separate TB2 drives on two separate computes after the upadate. Both computers are currently running 10.10.2.

I was on the phone with apple tech support and they elevated it to a top level tech rep. I was on the phone with the rep for over an hour and he really did try and help. We did screen shares so he could see it happening live, and he also had me download a data capture program and send the results to him at apple. SO currently I have no solution yet but hopefully there working on it. He also looked at this thread and acknowledge all the people having similar issues.

Im a video editor and this puts an absolute fault on my workflow, so I really hope they have a fix for this soon.

I'm even more worse just Plug Lacie Thunder bolt 2 d2, in few minute, Even is reading or not, Will hang my MAC and force shutdown !!

2014 imac i7 with 10.10.2

This issue appears to have been fixed in the OS X 10.10.3 update which was released a few days ago. I used the Combo updater to upgrade my Mac Pro (Late 2013) to 10.10.3 and I no longer experience a kernel panic whenever I power-off my OWC ThunderBay 4 enclosure.

Yes, hallelujah, Apple solved the problem with the 10.10.3 Yosemite update. No more kernel panics when shutting down external thunderbolt2 drives.

Confirmed as solved for me too with OS X 10.10.3 update.

Same here; TB problem seems to have been fixed with 10.10.3 update