I am trying to import photos which I took with my iPhone, emailed to myself, then drug to the desktop to then import onto Air bnb site. Previously this worked for me, but now they will not import when I drag them from the desktop. Any ideas??

Hi, welcome to the Apple Users Community.

Can you confirm what file type the photos are? Did you recently change your iPhone?

The photos may be in HEIC format not JPG

On your iPhone you might need to change Settings>Camera>Formats>Most Compatible so your phone saves as JPGs

The HEIC can be converted using free Apps in the App Store such as HEIC Converter.

Best of luck

You are making your life extremely complex, simply turn on iCloud on your devices and you can sync photos easily.