can't drag objects with new MacBook Air trackpad.

Hello Dougds.

Welcome to Apple Support Communities.

If I'm understanding correctly, the drag and drop feature is not working on your MacBook Air. i will be glad to assist.

Try an NVRAM reset to see if it resolves this:

Reset NVRAM or PRAM on your Mac

Additionally, have a look at your settings:

Turn on "three finger drag" for your Force Touch trackpad

Cheers.

Hi Dougds.

Glad to hear that you are all set.

Take Care.