I have Googled this a lot and am not finding any help. I did my first photo shoot and have all my pictures edited. I finished editing them and exported them but when I went to preview it on my Macbook, the picture was fuzzy. What am I doing wrong? If I keep the picture small, it looks perfect but when I enlarge it the picture has a lot of pixels. Please help! I need to get these pictures to my client! I have the resolution on 300.
How large are you trying to enlarge them? Adjusting your resolution isn't going to make any difference with digital images.
Give us the details regarding photo size. What is the size in pixels (width and height) before export, according to Lightroom?
What are the settings you are choosing in the File->Export ... dialog box in the Image Sizing section.
What is the size in pixels (width and height) after export, according to your operating system?