The "System Data" Nightmare
And How I Fixed It for Free
If you're reading this, you probably just Googled something like "how to clean system data macos free" or "best free disk space analyzer" or even "best free alternative to clean my mac" because your Mac is yelling at you.
I feel your pain. I have a 256GB MacBook. It's great, until it isn't.
One day, I couldn't update VS Code. My storage said:
Available: 369 MB
System Data: 245 GB (Wait, what?)
The "Free Trial" Trap
I tried all the popular cleaners (you know the ones). They look beautiful. They scan your disk in seconds. They show you exactly what to delete.
Then you click "Clean" and get hit with:
"Trial limit reached. Pay $39.99/year to remove these files."
I shouldn't have to pay a subscription just to find out that `~/Library/Application Support/Code/Cache` is eating 10GB. Or that I have 15 copies of `node_modules` from projects I abandoned in 2021.
Enter DiskMan (No Credit Card Required)
I'm a developer, so I did what we do best: I wrote a script. I wanted a free DaisyDisk alternative that ran in my terminal but still gave me the visual insights I needed.
DiskMan V3 is the result of that frustration. It's essentially a Swiss Army Knife for your disk:
- ✓ It's a CLI tool: Fast, lightweight, checks your disk directly from the terminal. Perfect for devs.
- ✓ It's a Visualizer: Run `diskman web` and you get a full interactive dashboard (sunburst charts, file previews) running locally on `localhost`.
- ✓ It finds the REAL junk: It targets `node_modules`, VS Code caches, huge log files, and duplicate downloads.
Why make it free?
Because basic disk hygiene shouldn't be a premium feature. I built this for myself, it solved my problem, and now I'm sharing it so you don't have to buy another external hard drive.
If it helps you clear 20GB of space today, maybe buy me a coffee? If not, no worries. Enjoy the free space. ✌️