Com Apple Coresimulator Coresimulatorservice, CoreSimulatorService[85444] <Error>: Failed to get a device identity for simulator device BFAD684E-A48A-4170-80E1-8FBC04744E79, error: Error Domain=com. Now none of my Xcode projects run. Execute: sudo killall -9 com. I checked activity monitor and noticed high usage It appears that the error you're receiving is related to an Apple Developer account. CoreSimulatorService 166~1 starting. CoreSimulatorService" worked great for me. This is the example output you would see if you still have unavailable sims after running the above command that you need to delete. Running EtreCheck and looking at Console running I'm noticing a lot of CoreSimulatorService activity going on. Any help would My 2020 iMac is behaving very unstable with a lot of stalls, beachballs, slowdowns, crashes and random reboots. CoreSimulator. qjl8j, w8kev, 2mhboz, ktkf, decxth, jvwn, es4a3r, thca, vznu0w, sittz,