lidmacospasswordsleep-wake
I don't like having to re-enter my password if I've just closed the lid for only 5 – 10 minutes. How can I disable this? I've already tried going to System Preferences –> Security & Privacy, and setting it to require a password only 1 hour after sleep or screensaver.
Mid-2014 Macbook Pro running Mavericks v10.9.4
Macs will wake up in response to many hardware events. Changing a USB/Firewire/Thunderbolt cable or even plugging in / powering on a connected device will wake Macs that are sleeping. Keyboard presses, clamshell sensor detecting an open of the display lid will also wake up a sleeping Mac. These are pretty well known and obvious, even if you don't realize a pet or power fluctuation can cause a wake event.
Two software items will also wake a sleeping mac and both rely on the power management / system management controller. Both are seen in the Energy Saver preference pane. This is how applications can do the same thing as hardware and wake your mac.
For macs with a battery - the power adapter needs to be connected and powered for much of this to work. The Wake for network access is both the standard WakeOnLan (WOL) as well as Apple's Bonjour Sleep Proxy. I like the article About Wake on Demand that explains how Apple has extended the concept of WOL and made a service.
If you disable these two items - software can no longer wake your sleeping mac and you can know if it's a hardware event or a software event. The other answers go into how to look at the logs to know which event has made a specific wake up request. Hopefully this helps frame the bigger picture of how your mac can take a cat nap with one eye open.
Upgrade to Mac OS X 10.7.2 or higher for the Security and Privacy setting "Require password time period after sleep or screen saver begins" to be respected after FileVault is enabled (though I don't see anything about this fix on the download page). There is no longer a need to keep System Preferences open forever (what a silly but effective fix) or any of the other workarounds.
Best Answer
As I recall, "lid closed" is an entirely different event than "sleep or screen saver" and you cannot disable asking for a password when the laptop is opened. There is a brief timeout where you can reopen the lid, in some cases, but it's only a few seconds.