rm vs. Time Machine

Public Service Announcement: if a Time Machine backup fails, it will leave behind a file with an extension of inprogress. (It’s actually a folder.) If you have a hard time deleting it, do not use rm! It will erase files from all backups, instead of just the one in progress. Instead, trash the inprogress file from the Finder and Empty Trash as usual. It might take a while, but it will Do The Right Thing.

You could also leave the file alone and just try to backup again; Time Machine will clear out the failed inprogress file when the next backup succeeds.

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