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timp1971 Author

Level 1

9 points

xpc.launchd[1] com.apple.dpd -- daemon fails to launch and tries again every second

Was trying to identify what process was making my external HDD spin up every 30 seconds while iMac was in sleep mode when I checked the error logs and got sidetracked with this:

The dpd daemon (which I understand is there to catch request to use the display as an external monitor) is trying to load every 1 second - failing - and repeating forever.

I don't need this daemon (I'll never try to use the iMac as an external display) - can I prevent this daemon from attempting to start up (or maybe change the respawn frequency to 24hrs etc) ?

System

iMac (27 inch, Late 2012)

Mojave 10.14.6

Error log (from Console system.log)

Jan 16 09:17:47 Tims-iMac com.apple.xpc.launchd[1] (com.apple.dpd[85882]): Service exited with abnormal code: 75

Jan 16 09:17:47 Tims-iMac com.apple.xpc.launchd[1] (com.apple.dpd): Service only ran for 0 seconds. Pushing respawn out by 1 seconds.

Jan 16 09:17:48 Tims-iMac com.apple.xpc.launchd[1] (com.apple.dpd[85883]): Service exited with abnormal code: 75

Jan 16 09:17:48 Tims-iMac com.apple.xpc.launchd[1] (com.apple.dpd): Service only ran for 0 seconds. Pushing respawn out by 1 seconds.

Jan 16 09:17:49 Tims-iMac com.apple.xpc.launchd[1] (com.apple.dpd[85884]): Service exited with abnormal code: 75

thanks

tim

iMac 27", macOS 10.14

Posted on Jan 16, 2020 2:02 AM

Best reply

timp1971 Author

Level 1

9 points

Posted on Jan 16, 2020 11:55 PM

** Solution **

There may be consequences to this fix I've not spotted (and it may need to be re-applied after OSX updates) but it does appear to fix the issue for me. I have suspended com.apple.dpd.plist daemon at startup as follows:

Reboot with cmd-R to Recovery mode
Once rebooted in Recovery mode, open Terminal and in order to disable System Integrity Protection (SIP) to all root user to edit system files, type: csrutil disable
Reboot again
Open Terminal and go to /system/library/launchdaemons/ where you rename com.apple.dpd.plist
Reboot back to Recovery mode for a second time
Once rebooted in Recovery mode, open Terminal and type: csrutil enable
Reboot for one final time and the dpd daemon should be prevented from running at launch. Checked system logs and the process is no longer attempting to run (and fail)

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xpc.launchd[1] com.apple.dpd -- daemon fails to launch and tries again every second

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