verleihnix Posted August 29, 2019 Share Posted August 29, 2019 (edited) com.apple.apfsd.wbc_drain prevents system to go to sleep. manual sleep and wake works fine. pid 61(UserEventAgent): [0x00000163000b81db] 01:09:56 BackgroundTask named: "com.apple.apfsd.wbc_drain" does someone knows what kind of process that is? My system is the Haswell desktop. DP10 - iMac 2015 Mojave is ok Edited September 30, 2019 by verleihnix Link to comment https://www.insanelymac.com/forum/topic/340079-catalina-wont-auto-sleep-comappleapfsdwbc_drain/ Share on other sites More sharing options...
verleihnix Posted September 24, 2019 Author Share Posted September 24, 2019 (edited) I searched the net and found hints about WBC which points to FusionDrive. So I detached the main drive (Mojave FusionDrive) Without it, the process does not kick in. Edited September 24, 2019 by verleihnix Link to comment https://www.insanelymac.com/forum/topic/340079-catalina-wont-auto-sleep-comappleapfsdwbc_drain/#findComment-2691195 Share on other sites More sharing options...
verleihnix Posted February 22, 2020 Author Share Posted February 22, 2020 (edited) I am back to Fusion Drive Catalina 10.15.3. The problem still exits. Even real Macs have this issue. Now I wrote a shell script which kills the coresponding pid UserEventAgent. May be this is not so sophisticated, but it works. It will be called every 10min by root cron job. sudo crontab -e */10 * * * * /usr/local/bin/kill_UserEeventAgent.sh >> /var/log/script_output.log 2>&1 kill_UserEeventAgent.sh Edited February 22, 2020 by verleihnix 1 Link to comment https://www.insanelymac.com/forum/topic/340079-catalina-wont-auto-sleep-comappleapfsdwbc_drain/#findComment-2709448 Share on other sites More sharing options...
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