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coretelephony trace file error a file operation for coretelephony tracing has failed, you may be out of disk space. details 'error opening file /tmp/ct.shutdown, err = operation not permitted

I got this error:

"CoreTelephony Trace File Error
A file operation for CoreTelephony tracing has failed, you may be out of disk space. Details 'error opening file /tmp/ct.shutdown, err = operation not permitted"

I tried to solve it by searching similar CoreTelephony errors. Couldn't solve it yet.
Software not working, specially photoshop...

Any ideas?

iMac, OS X El Capitan (10.11.6)

Posted on Oct 4, 2016 8:10 AM

Top-ranking reply

vajra77

Level 1

9 points

Posted on Oct 5, 2016 1:19 PM

Same thing here, iMac with OS X 10.11.6. It started one or two days ago. Have not found any valuable solution online yet, tried rebooting in recovery mode and checking disk but it looks like everything is ok with disk and permissions.

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33 replies

Oct 28, 2016 2:05 PM in response to sbkramerjr

Absolutely a perfect Solution:

Boss: sbkramerjr (credited Jhmmy):

Reboot your Mac into Recovery Mode by restarting your computer and holding down Command+R until the Apple logo appears on your screen.
Click Utilities > Terminal.
In the Terminal window, type in 'csrutil disable' and press Enter.
Restart your Mac.
If error message gone, success!
Reboot your Mac into Recovery Mode by restarting your computer and holding down Command+R until the Apple logo appears on your screen.
Click Utilities > Terminal.
In the Terminal window, type in 'csrutil enable' and press Enter.
Restart Mac.

^EJ^ Batenhorst

nwdbhux

Level 1

4 points

Oct 29, 2016 7:08 AM in response to sbkramerjr

Tried several other fixes, but this one finally worked for me. Thank you for posting!

Oct 31, 2016 11:19 AM in response to dambadiateixido

We tried the terminal fix on 13 laptops (we are a school) running el capitan and although core telephony error went away se still couldn't update any 3rd party software. Upgraded to Sierra on the laptops and everything started working again. Sierra seems to be the complete fix at this time.

coretelephony trace file error a file operation for coretelephony tracing has failed, you may be out of disk space. details 'error opening file /tmp/ct.shutdown, err = operation not permitted