My external drive is not showing up mac

Why is my external hard drive not readable on Mac? The most common issue is your drive being formatted incorrectly. In this case, you'll need to change the format of your drive using Disk Utility. Other reasons might include issues with power supply, faulty cable, and your drive being corrupted or broken.

Try the following to make sure your Mac is set to show mounted drives on the desktop. Open the Finder. Click on Finder in the menu at the top of your screen. Choose Preferences > General and make sure that there is a tick beside External Drives.