If I erase my old computer will my new MacBook keep all of the information?
I want to erase and reset my old MacBook to factory settings so I can give it away. If I erase my old Mac will it also erase everything on my new Mac book air ??
MacBook Pro
No as long as you follow:
What to do before you sell, give away, or trade in your Mac - Apple Support
What is synced in iCloud will only be erased if the sync is active and you delete it specifically.