Apple - How do I quickly find large files and folders on my mac?

try

du -sh * | grep -E "\dG"

to get all files and folders of size 1G and above. (Output will only show once du is done)

GrandPerspective can create a Treemap:

You can use spotlight as well:

mdfind 'kMDItemFSSize > 2000000000'

Add or remove zeroes to get more or less hits as you are searching.