Q: Connect iPhone 6s with Macbook Air It Show Not Charging

Howdy jayypt,

If you're having trouble getting your iPhone to charge, see the steps outlined below. These can help stabilize the connection between your MacBook Air and your iPhone so as to charge it consistently.

1. Check your charging cable and USB adapter for signs of damage,* like breakage or bent prongs. Don't use damaged accessories.
   
2. Use a wall power outlet and check for firm connections between your charging cable, USB wall adapter, and wall outlet, or try a different outlet. 
3. Remove any debris from the charging port on the bottom of your device, then firmly plug your charging cable into your device. If the charging port is damaged, your device probably needs service.
   
4. Let your device charge for a half hour (If your device is unresponsive afterward, learn what to do).
5. Force restart your device: Press and hold the Sleep/Wake and Home buttons at the same time for at least 10 seconds, until you see the Apple logo. Then let your device charge for another half hour.
6. If your device still won’t power on or charge, take your device, charging cable, and charging adapter to an Apple Retail Store or Apple Authorized Service Provider for evaluation. You can also contact Apple Support.

*If you're unsure about whether an accessory is damaged, take it to an Apple Retail Store or Apple Authorized Service Provider for evaluation, or contact Apple Support.

If your iPhone, iPad, or iPod touch won‘t charge
https://support.apple.com/en-us/HT201569

All my best.