Finding 300 GB in macOS System Data: Time Machine Local Snapshots

Mail popped up an alert: “Mail cannot save information about your mailboxes because there isn’t enough space in your home folder.” My first two suspects in these situations are always Xcode junk or a full Trash. I opened OmniDiskSweeper and started scanning. I love it because there is no visual fluff. You scan, you delete, you move on. I cleaned up old runtimes, old Xcodes, and VM images. That…