Why can't I charge my iPhone on my Macbook AIr?

Whenever I plug in my iPhone to my laptop to charge it a message comes up. I attached the picture. Does anybody know how long this will last or how to fix it?Why can t I charge my iPhone on my Macbook AIr Added (1). This never used to happen before btw

Because: Apple.

Mac book airs don't have enough power to charge one. It overloads the usb circuit, hence the message.

Try this.
- Disconnect everything except power adapter (no drives, no USB keyboard, no USB mouse).
- Restart.
- Test the phone.

If it still overloads the port, take the phone to an Apple repair shop for testing.

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