Finder?

There aren't any missing folders. Apple may have (finally!) removed the "Macintosh HD" from the Desktop as people would routinely use it as a place to drop all their files which would then disappear. You can use Finder>Preferences to tell it which items should appear in the Sidebar of every Finder window, then select whatever you want. In the sidebar, your computer's hard disk will appear under "Devices".

I have tried endlessly without success to find Macintosh HD in Finder or under devices. It doesn't appear anywhere. I have tried to go into Preferences in Finder and "Sidebar" but there is no listing, or radio button, for Macintosh HD. I do have Macintosh HD on my desktop but can't get it into finder.

Where is it? Any idea?

Try checking "Hard disks" in Finder > Preferences > Sidebar > DEVICES.

Odd that your specififc volume name doesn't appear there if it does appear on the desktop.

I am having the same problem - sidebar does not show Desktop but the Desktop box is checked in my Finder Sidebar preferences. Any thoughts?

Thank you in advance for any guidance.

Drag the Desktop folder from your user folder to the sidebar.