You should use Apple Photos app on your MacBook/ Mac Studio/ iMac for managing photographs as it is such an amazing software which lets you tag photographs, create smart photo albums, export photographs in various sizes and resolutions and many more reasons.

Exporting images using Apple Photos - If you want to export the images in reduced size/ quality in bulk then following was the result of our tests - 

1) Select the images that you want to export, then go to File menu >> go to Export >> Click on Export Photos