Hacker News Reader

Grandperspective has the same look as disk inventory x but I found it to be significantly faster.

I haven’t noticed any nag screens but I didn’t when using disk inventory x either so I might just be immune to them.

https://grandperspectiv.sourceforge.net/

You can also buy Grandperspective from the app store for a few dollars to help support the overall development.

Wow, that screenshot of it is on Mac OS X 10.2 Jaguar. EXIF says it was taken 2004-12-06.

They've been maintaining that little app for a long time.

Yep! I first encountered it in Tiger, and, unlike most of my favourite apps from that time, it's kept going strong.

Or Filelight, which is free! https://apps.kde.org/filelight/

only Linux and Windows.

The source is available (https://invent.kde.org/utilities/filelight), and there's a chance it'll build on macOS. I haven't tried, though (and am not the original recommender).

No reason it shouldn't work on MacOS, a lot of KDE/Qt projects compile fine without any additional changes.

But yes, if you're on Mac it's probably easier to buy Daisy Disk.