I built a zsh cleanup script for macOS dev machines — and learned more than I expected

If you do iOS and Android development on a Mac, your disk is quietly dying.

Between Xcode's DerivedData, old iOS DeviceSupport folders, Android SDK build-tools release candidates, stale node_modules, CocoaPods cache and Docker leftovers — it's not unusual to have 20–50 GB of junk that your machine accumulated over months without ever asking.

I got tired of manually hunting these down, so I wrote clean-mac: a single zsh script that cleans 18 categories of dev waste, with a --dry-run mode that shows you exactly what would be deleted before touching anything.

curl -fsSL https://raw.githubusercontent.com/milyzc/clean-mac/main/clean.sh \

-o clean.sh && chmod +x clean.sh