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High Sierra's Disk Utility Does Not Recognize Unformatted Disks (tinyapps.org)
macOS 10.13's Disk Utility 17.0 (1626) does not recognize raw drives, reads a blog post, shared by several readers. From the post: Diskutil does recognize the drive. We'll use it to perform a quick, cursory format (e.g., diskutil eraseDisk JHFS+ NewDisk GPT disk0) to make the disk appear in Disk Utility, where further modifications can more easily be made. Plugging in an unformatted external drive produces the usual alert, "The disk you inserted was not readable by this computer. Initialize... | Ignore | Eject", but clicking Initialize just opens Disk Utility without the disk appearing. There's an option in Disk Utility to view "all devices," but clicking that doesn't show raw disks, the blog post adds.
Apple assumes everyone gets everything from Apple. And Apple would never sell a device that was not prepared at the factory.
How do you expect to format a drive to make it appear when you can't make it appear to format the drive?
Do people think about this kind of thing anymore?
You're holding it wrong?
Did you try turning it off and turning it back on again?
That was the turning point of my life--I went from negative zero to positive zero.
What? Maybe System 7 was innovative. 9 was a desperate attempt to keep the ol' geezer marketable after their replacement OS effort Copeland was aborted. It was very uncertain whether or not Apple would even survive. OSX, even in it's initial craptastic state, was welcome relief.
W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
I ran into this exact problem today. Clicking "Initialize..." did nothing, with the drive not showing up in Disk Utility.
Turned the enclosure off and back on, and clicked "Ignore." Disk came right up in the Utility without issues, and I was able to get it working from there.
The world moves for love. It kneels before it in awe.
https://www.ifixit.com/Teardown/iMac+Intel+27-Inch+Retina+5K+Display+Teardown/30260
See Step 4.