atd stopped working on OS X 10.10.3 I'm using OS X Yosemite, just updated to 10.10.3 and the at command and related (atq, atrm etc) have stopped working. Has atd been disabled in the latest 10.10.3? If so how do I investigate and reenable the required permissions?

~$ atq
atq: cannot regain privs: Operation not permitted


As background, I have a job that runs daily (using launchd) and submits a list of jobs to atd. The list of jobs are related to events occurring that day so they change times daily. So I use atd to run these jobs based on the daily event times.

It has been working fine up until the recent upgrade to 10.10.3.

/usr/libexec/atrun is enabled and running fine, according to launchd.
That message suggests that you don't have the correct privileges to run atq. Try running it with sudo from the command line to see if that helps i.e.:

&gt; atq
atq: cannot regain privs: Operation not permitted
&gt; sudo atq
Password:
&gt;