In keychain access>edit>edit login keychain settings, there is an option to lock the login keychain when sleeping or idle for x-minutes. For security reasons should this be setup to lock the keychain when sleeping? I have tried it and keep getting all kinds of prompts to unlock my keychain after waking from sleep even though it is already unlocked. It seems to really mess up the system somehow...mainly icloud and imessages. Thank you for the feedback.