how to format an external ssd drive for mac high sierra

Open Utilities and Disk Utility, highlight the grayed-out volume, and select First Aid in the top center.

If this doesn’t work, you may need to use the Verify Disk utility to make sure everything is working as it should.

Open Finder and navigate to the drive in Devices.

The volume should shift from gray to normal to signify it has been mounted.

Highlight the volume and select Mount.

If a volume is present but not mounted, it should be grayed out here.

Check for a volume if the disk is present.

Then, open Utilities > Disk Utility and make sure the disk is listed in the left window.

Attach the drive if it isn’t already connected.

This should be done automatically when macOS detects the drive, but it doesn’t always work. If you think the drive works fine, let us see if we can manually attach it to macOS. If the box is checked, move on to fix the external hard drive not showing up on Mac. By default, it doesn’t display much, and the setting to not show external disks may be enabled.

Use a USB power cable if you suspect this to be the issue.ĭepending on what you find here, you can troubleshoot either the drive or your Mac.įirst, make sure Finder will display drive icons. A USB cable carries 5V, and if this is the sole power source for the drive, it may not be enough. Check that the drive is receiving enough power.Make sure your drive doesn’t have or use a power-saving or sleep function.Try attaching the external drive to another computer to see if it works on that one to rule out damage to the drive itself.Some imported drives come completely empty, and while macOS should detect and offer to format them, it doesn’t always work.

Make sure the drive has been formatted.Reboot your Mac to see if it was an open program or app stopping the drive from being detected.Try a different wall outlet if there is one nearby.Change the hard drive power cable if you have a spare.Check the condition of the cable and swap it if you have a spare.Check that the external hard drive has power if it needs it.Check that the cable from the hard drive to your Mac is connected properly.After all, no one wants to waste half a day because they didn’t realize something just wasn’t plugged in properly. Get into the habit of doing this with any computer issues, as it can save time, money, and hassle in the long run. Troubleshooting an External Drive with a Mac First, we will check the basics, and from there, we make sure that macOS is set up to display external drives, can mount the drive, and that the drive has no errors on either the disk itself or its file structure. If your external drive still doesn’t appear, we have a couple of simple troubleshooting tips to fix an external hard drive not showing up on Mac.

How to format an external ssd drive for mac high sierra