charger for old model MacPro air
My charger quit working for old MacBook pro air how do I buy a new one?
MacBook Pro 13″, macOS 10.13
Question marked as
There are MacBook Pros and there are MacBook Airs but there isn't such a thing as a "MacBook pro air."
To identify the charger that is compatible you will need to know which of the above and also the model year. The model year is available at Apple menu > About this Mac.
Once you have that information, see the following Identify your Mac power adapter - Apple Support
or reply here with the information.