How to Charge Your iPhone with The New MacBook Air
Step 1. Plug your iPhone into USB port of MacBook Air with a cable
Step 2. Now, open the lid of your laptop and power your MacBook
Step 3. Check your iPhone and it will start charging
Step 4. In case you’d like to charge your iPhone with MacBook air while saving the laptop’s battery from draining, you can put it back to sleep and your iPhone will continue charging