Pages look different on different computers, using same browser

Hi! I’m not sure if this question is a general WordPress question or specific to the theme I’m using. When I create a page on my site, it looks great and all of the text and images are properly aligned (I’m using a MacBook and Chrome). However, when someone else looks at the same page on their own Mac using Chrome, some of the text and/or images do not look right. Is there a way to fix this? Thanks!