Should iTunes prevent the host Mac going into sleep mode when syncing? Lengthy syncs between iTunes and my Apple TV are interrupted by my Mac going to sleep. When I wake the laptop, unsurprisingly the sync has stopped. Am I right in thinking that iTunes usually keeps the computer awake as long as the sync is in progress? If so, what could have gone wrong? As an interim measure I have set the laptop remain awake when connected to power, but this is not ideal. If it helps the great minds of the forum, here's my setup: MacBook Pro 15" unibody connected via WIFI Airport Extreme N router USB HD shared via Air Disk Apple TV connected to Airport via ethernet All software is fully updated across all devices. Help!