The Messages app on my MacBook syncs with iMessage in my iCloud account (i.e., I can receive/respond to iMessages that come in, just as I can via the Messages app on my iPhone); but SMS texts do not appear in the Messages app on the laptop (only Messages on the phone). I am sure that I used to also see SMS messages on the laptop, but somehow no longer do. What is the setting to make it possible? Thx