Can't text some people on Mac that can text on iPhone
Can find any pattern to it. There simply are some numbers that when I enter the name in Message that appear in Red. Message doesn't send or receive from them. however, text to same person and same number works on iPhone.
In general a lot of what Apple has on website about Message doesn't appear on my Mac. In Messages Preferences, no Option to “Enable Messages in iCloud” or to Sync Now in Settings pane. My Messages version is 14.0. Latest?
MacBook Pro 13″, macOS 11.6