I've been looking for some clear instructions on how to do this and haven't found anything. I'm still getting messages that don't pop up on messages my mac, so how do I send and receive everything from my apple ID?
you cant with the number you must send and receive messages from you Apple ID to be sync'd across platforms.
Example your friend with iPhone/iPad must send an iMessage to your ####@me.com address and not your phone number. Make sure your iMessage settings are set up to receive at your ####@me.com address.