We’ve covered quite a few free disk space analyzers for Windows over the years, and I figured it would be worth throwing in one for Mac users as well. When it comes to a specific purpose like this the selection of free apps for Mac users is a lot more limited than it is on Windows, but that’s not to say there are no good options available. In general I’d say that Disk Inventory X does a really good job and competes quite well with the free Windows counterparts.
I can’t say this does anything extraordinarily special, but it incorporates everything you’d likely need. As you can see in the screenshot above the files and folders are sorted largest to smallest, and there is an accompanying graphical representation if you’d rather identify large files and folders by drilling into the blocks.
One of the cool aspects of Disk Inventory X is that a drawer slides out from the right side to show you a breakdown of the types of files on your machine. That is very convenient for pinpointing whether it’s something like your music collection that is occupying the entire disk.
Disk Inventory X Homepage (Mac only; Freeware)