![]() ![]() Inspect the cable for any obvious damage like cuts, frays or bent connectors.Try these steps to troubleshoot a potentially faulty USB cable: ![]() Cables can become loose over time, suffer physical damage, or just stop working reliably. One of the simplest and most common reasons an external drive won’t show up is a problem with the USB cable. We’ll explain each of these issues in more detail and how to diagnose them below. Disk permissions – The current user account may lack permissions to access the external drive.Insufficient power – Some external drives don’t get enough power from USB ports.Bad USB port – Problems with a Mac’s USB port can prevent detection of an external drive.Drive formatting issues – The drive may have errors or hasn’t been properly formatted for Mac.File system incompatibility – Mac can’t natively read drives formatted in NTFS or other Windows-based file systems.Outdated driver – External drives may need updated drivers to be compatible with macOS.Loose or faulty USB cable – Damaged cables are a leading cause of external drive failures.Here are some of the most common factors: ![]() There are several reasons an externally connected hard drive may not mount on a Mac system. If the drive still isn’t recognized, continue reading for more advanced troubleshooting. The steps above will resolve most simple USB glitches that prevent an external drive from showing up.
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