4.6.14 Filtering Spam During Power Nap

Keeping Your Mac Awake

In order for SpamSieve to filter your mail immediately, your Mac needs to be awake with the mail program running. Otherwise, there will be delays for iPhone spam filtering and for remote training using the drone setup. To prevent your Mac from going to sleep:

On macOS 13, go to Displays in System Settings and enable the Prevent automatic sleeping on power adapter when the display is off option.
On macOS 12 and earlier on a desktop Mac, go to Energy Saver in System Preferences and check the Prevent your Mac from sleeping automatically when the display is off option.
On macOS 12 and earlier on a laptop Mac, go to Battery in System Preferences, click on Power Adapter, and check the Prevent your Mac from sleeping automatically when the display is off option.

Note that even though the Mac itself is awake, you can still save energy by setting the display and hard disks to sleep.

Enabling Power Nap

It’s also possible for SpamSieve to filter mail, once per hour, while your Mac is asleep, using macOS’s Power Nap feature. To enable Power Nap:

On Macs with Apple Silicon (M1 or M2), Power Nap is always enabled.
On macOS 13, you can control Power Nap from the Battery or Energy Saver pane of System Settings. Laptop Macs have separate settings for enabling Power Nap when on battery or AC power.
On macOS 12 and earlier, you can control Power Nap from the Battery or Energy Saver pane of System Preferences.

In order for Power Nap to work, the Mac needs to be connected to the Internet, and Apple Mail needs to be running before you put the Mac to sleep. (Power Nap does not support other mail clients.) macOS will suspend Power Nap operations in situations where your Mac is likely to overheat. When everything is set up as described above, Mail will check for new messages and filter them through SpamSieve once per hour.