Moving image to new folder and working on projects from 2 different macs or in collaboration with somene else

today I moved some images to another folder, and the assets are missing within the projects… how can we solve this ?

and this brings me to a new, and related question, (the the post exists I appreciate the url) how can I work on a project from 2 diffent macs or in collaboration with other people? if the images are tied to the path within the mac ?
I work on my Imac, but when I travel, need to bring work with me on my macbook.

thank you.