ncdu is fabulous. I used it a while back on my 2009 Mac mini and recovered 40GB of disk space. 8GB of this was in just four folders: ~/Library/Logs/CrashReporte

ncdu is fabulous. I used it a while back on my 2009 Mac mini and recovered 40GB of disk space. 8GB of this was in just four folders: ~/Library/Logs/CrashReporter/MobileDevice, /private/var/db/systemstats, /System/Library/Caches/com.apple.coresymbolicationd, and /Library/Caches/com.apple.iconservices.store.