USB drive mounting problems 12" MacBook on 10.11.4

Question

USB drive mounting problems 12" MacBook on 10.11.4

I recently picked up a 12" Macbook, on its maiden voyage I had continual problems with mounting USB jump drives via the Apple manufactured USB-USB-c adapter. Basically I was able to mount a USB3.0 drive 4-5 times with normal ejects before the drive would no longer mount and I would need to reboot the computer in order to handle another mounting. Also once this problem manifested itself on one drive I was unable to mount other usb drives until a reboot. Anyone else experiencing this?

Model Name: MacBook

Model Identifier

MacBook, OS X El Capitan (10.11.4)

Posted on Apr 16, 2016 9:51 AM

Reply

Answer 1

Apr 18, 2016 4:45 AM in response to performance-video

Yes I had the same problem with 10.11.4. After restoring 10.11.3 the problem is gone. Apple now it's your turn for a bug fix in 10.11.5. Until this happens I don't recommend to install 10.11.4 on MacBook 12.

Reply

Answer 2

Apr 18, 2016 7:30 AM in response to marccoular

Apple is not likely to see problems posted here. I suggest that you and performance-video report this issue to Apple directly:

http://www.apple.com/feedback/macosx.html

This is good advice even if someone can suggest a work-around in this discussion.

dick glendon

Reply

Answer 3

Apr 18, 2016 3:23 PM in response to performance-video

I have also run into this; both when hooking up a USB drive directly through a USB-C to USB-A adapter, through a USB-C to Micro-USB cable, or through the Satechi USB-C dock. When this happens, the Satechi also stops recognizing SD cards plugged directly into the dock. Rebooting temporarily fixes the issue.

I've also noticed charging issues that started recently; in the past, I've been able to recharge (slowly) from a USB battery pack that can handle an iPad. Now plugging the battery pack in just seems to make it drain faster.

I'm going to try an SMC reset next, see if that might fix things.

Reply

Answer 4

mttsco

Level 1

4 points

May 11, 2016 8:43 AM in response to performance-video

Hello!

I've exactly the same issue on my Macbook Air 11" 2015, have you found any workaround for this or do we have to wait until 10.11.5?

Reply

Answer 5

May 16, 2016 5:23 PM in response to performance-video

Please update your Macbook 12 now! Apple just released a new OS X El-Capitan 10.11.5 update and it works like charm again! 🙂

Reply

Answer 6

May 18, 2016 1:32 AM in response to firdauskop_3010

Indeed 10.11.5 seems to fix the issue. Thank you apple.

Reply

Answer 7

erikdc

Level 1

4 points

Jul 2, 2016 8:47 AM in response to marccoular

Updating to 10.11.5 didn't fix the issue for me. I got my MacBook in May, so I had thought the dodgy usb-c functionality was just part of the experience. I was hopeful updating would fix the mounting issue after reading this thread. It did not.

I don't mind having one usb-c port for multiple functions. I do mind that it doesn't function properly.

Reply

Answer 8

erikdc

Level 1

4 points

Jul 2, 2016 10:03 AM in response to marccoular

One more thing...

The problem only occurs with USB 3.0 drives. Older USB 2.0 and 1.0 drives are mounted properly. To get a USB 3.0 drive to recognize and mount, the only solution is to reboot.

Reply

Answer 9

Sep 14, 2016 10:55 PM in response to erikdc

Same Problem here in Germany. MB 12 2015, USB 3 only working after reboot... (macos 10.11.6 and 10.12)

Reply

Answer 10

capdaddy

Level 1

9 points

Sep 17, 2016 2:47 AM in response to performance-video

I have this problem too - the performance of the port seems very temperamental too. I can't even get it to work well enough to perform a simple Time Machine backup, I've now been through 3 external hard drives in case they were the problem!

Reply