I have a new MacBook Air and it came shipped with a bogus plist (com.apple.batteryd) that had launchd going nuts. Launchd was trying to run /usr/local/libexec/batteryd every 10 seconds, stopping the computer from sleeping and spamming the system log. Edit: For reference, this was what was being spamed in the system log every 10 seconds: Code: 1/13/11 11:09:31 PM com.apple.launchd (com.apple.batteryd) Exited with exit code: 1 1/13/11 11:09:31 PM com.apple.launchd (com.apple.batteryd) Throttling respawn: Will start in 10 seconds 1/13/11 11:09:41 PM com.apple.launchd (com.apple.batteryd) posix_spawn("/usr/local/libexec/batteryd", ...): No such file or directory So I went into Terminal and typed ' sudo rm "/System/Library/LaunchDaemons/com.apple.batteryd.plist" ' and everything is as it should be, but I just noticed Apple released a update that's meant to fix this. - http://support.apple.com/kb/DL1354 (Which is weird because the update is for 10.6.5 and I was having trouble with 10.6.6). After going through the update files I noticed Apple's method of removing the file was much more complex. Apple's Method for removing com.apple.batteryd.plist: Code: #!/bin/sh if [ -e "$3/System/Library/LaunchDaemons/com.apple.batteryd.plist" ]; then sudo launchctl unload "$3/System/Library/LaunchDaemons/com.apple.batteryd.plist" rm -rf "$3/System/Library/LaunchDaemons/com.apple.batteryd.plist" fi Could just deleting the plist like I did cause any harm?