Run First Aid to repair the internal disk.Try to mount the internal hard drive manually.When you see the word 'Show' or 'Hide', please click to change it and then check whether the internal disk appears. Go to Finder -> move your cursor to the Locations section in the left panel.Go to Finder -> Preferences -> Sidebar, and make sure the Hard disks option is checked.Go to Finder -> Preferences -> General, and make sure the Hard disks option is checked.If your Mac can still boot up when the internal hard drive is not showing up, please try the following fixes. As for the internal hard not showing up problem, I’ll discuss it in 2 situations: Mac can start up and Mac can’t start up. What about hard drive not showing up? Please read this page when external hard drive not showing up on Mac. That’s all about how do I get my Mac to recognize my USB. If This Can't Help You With Free USB Data Recovery, Nothing Will! Reset SMC ( how to the SMC of your Mac?).Check the USB flash drive in System Information.Other possible ways to fix USB not showing up on Mac: How to recover data from formatted SD card? Give it a new name or specify a proper file system (optional).How to reformat the USB drive to a File System that can be supported: In addition, you can check the USB drive and fix it in Terminal. Click First Aid at the top of the right pane.Select your USB drive from the left pane.Please run First Aid to repair your USB flash drive:

Check External disks under both General tab and Sidebar tab.You should go to change the Finder Preferences:

Reason 2: Improper Finder Preferences Settings When find your flash drive doesn't appear on Mac after connection, you should first do the following things: The broken cable/port, or insufficient/unstable power supply could make your Mac not recognizing USB. You can find data recovery tool designed for Mac and Windows platforms easily on the internet.įree Download Reason 1: Connection ProblemĬonnection issue is one of the most important reasons why your USB drive not showing up Mac. Tip: Please take actions immediately to recover data from your USB drive when it becomes abnormal.

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