My MacBook Air won't shut down when an external hard drive is connected. The screen goes black, and the mouse pointer is still there. I think this started happening when I upgrade to Yosemite. Any suggestions as to how I might fix this?

  • Just curious. Do you use products from AVID or X-Rite?
    – user136834
    Feb 15, 2018 at 16:03
  • No -- this problem ended up fixing itself, as it happens; either that or I stopped using external HDDs habitually. Are you having a similar issue?
    – Jim
    Feb 17, 2018 at 13:24
  • Yes, in my case it turned out a process called “hasplmd” which caused random Kernel Panics and prevented macOS Sierra from going to sleep/shutdown. I have shared a article about it here medium.com/@howdytom/…
    – user136834
    Mar 11, 2018 at 23:10

1 Answer 1


Are you sure something is not still running...or something is preventing the disk from unmounting.

If there's a grey circle -- then it might be running fsck on the disk...

Now, another thread suggested:

Start Up in Verbose Mode using Command-V

Then issue: sudo shutdown -h now

Also, more /var/log/system.log

This should show you what's occurring as it shuts down.

The sudo shutdown -h now is equivalent to the Shut down menu option.

Also, try going into Disk Utility and manually click on the Unmount icon. I would just want to see if it will unmount normally.

If it doesn't, then, I'm thinking SOMETHING is still using the disk..

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .