Question: how to transfer your contacts from mac to iphone?
Answer: Step 1: Open your Mac and go to "System Preferences" > open "iCloud" > Sign in with your Apple ID > select the whole or certain contacts to sync to iPhone. Step 2: Open your iPhone and go to "Settings" > "Your name" > "iCloud" > Turn on "Contacts" option. Then, the contacts will be synced to your iPhone via iCloud.