I guess your Macbook Air port is Type-C port, there are following ways for you: Way 1: need a USB A to USB C adapter. If your computer is type-c port, you need to have a USB A to USB C adapter, use the equipped usb cable, type-C end of USB cable to connect the camera, another end of USB Cable (usb-A) to connect the USB A to USB C adapter, and then insert into your computer, you will see a U disk icon on your computer, and then you can transfer the phones and videos on your computer. Way 2: Need a usb c sd card reader for Micro SD/SDXC/SDHC. We hope it is helpful to you. Thanks for your kind asking 

64G (only supports TF cards in FAT32 format of class 10 or higher) 

only Need to insert an SD card (maximum 256G, recommended 16GB~128GB) to use 

Definitely. I just fit a 15" x 10" x 2" laptop with a 15.6" screen in the compartment. Your sleek and slim macbook will definitely fit. 

K&F Concept camera backpack you are asking, we regret that this could not be suitable for your 15" laptop, please check asin: SKU:KF13.084 please have a check if this will fit your needs. if you need more information please let us know.