Apple - What software can turn off Wi-Fi automatically when closing lid?
You could combine DFGKApps's script for turning off Wifi and DssW's Power Manager to run the script on sleep.
The Terminal.app command to disable WiFi appears to be:
networksetup -setairportpower en1 off
To re-enable WiFi use:
networksetup -setairportpower en1 on
Be sure to test these commands using Terminal.app, as I suspect they may require tweaking depending on your network set up.
Be aware that running a script on sleep does come with limitations. The time available for the script is short and can not be extended.
I am a software engineer involved with Power Manager, so feel free to ask technical questions about how to use it.
Have you tried your Energy Saver preferences?
- Go to System Preferences
- Click on "Energy Saver"
- On the "Battery" tab, make sure "Enable Power Nap while on battery power" is unchecked. That should stop it from checking emails while in sleep mode.
- While you're at it, if you don't want it to connect to WiFi at all while sleeping, go to "Power Adapter" and uncheck "Wake for Wi-Fi network access" and "Enable Power Nap" there too.
- To further save power, you could also (on the Battery tab) check "Put hard disks to sleep when possible". That should help with battery drain - but it's unrelated to WiF-i.
You may have found and discounted that solution already, but if you let us know what other solutions you've tried, it might help to pin it down.