Launch the Terminal app from the Utilities folder via Applications.Apple circulated a step-by-step guide for a quick fix. Some users discovered that file sharing hits a snag. Apple swung into action immediately to resolve it but inadvertently broke file sharing. If you have encountered one of these problems, try to fix them with the solutions below: Solution #1 Fix File Sharing with Terminal on High SierraĪ security flaw detected in High Sierra exacerbated vulnerability as anyone could get administrator access on Mac even without a password and username. 'Mac File Sharing permissions not working Mac file sharing connection failed Mac SMB not showing files unable to access shared folder on Mac'. Apple’s Instruction to Fix Broken File Sharing People Also Read: How To Share Files Between Users On Mac: 3 Ways To Do It Part 1.