Finder fixes and how-tos
Macintosh HD has not gone anywhere. Finder just isn't set to show your startup disk, and two settings bring it back. Here they are, plus the keyboard routes that skip the settings entirely.
Finder only shows what it is told to show. Open Finder, then Finder > Settings (called Preferences on macOS 12 and earlier), and change two tabs:
The wording is the one Finder uses on macOS 15 Sequoia. If a setting is missing on your version, look in the same two tabs for the closest name.
/ and press Return; Finder opens the top of the startup disk.open / does the same.To keep it handy without touching Settings, open the Computer window, select Macintosh HD and press ⌃⌘T. Apple's shortcut list describes that as adding the selected item to the sidebar.
The disk is only called Macintosh HD if nobody renamed it. To see the current name:
diskutil info / | grep "Volume Name"
On the Mac used for this guide that printed Volume Name: Macintosh HD. If yours prints something else, that is what to look for in the sidebar and on the Desktop. Disks are also listed in /Volumes, where ls -la /Volumes showed Macintosh HD -> /: the entry is a link to the top of the startup disk, not a second copy.
Since macOS Catalina, the startup disk has been two volumes: a sealed, read-only system volume and a Data volume that holds your files. Finder shows the pair as one Macintosh HD, so there is no second disk to look for in the sidebar. If you spot the Data volume in Disk Utility, leave it alone. See APFS explained for how the volumes share space.
The same two tabs control more than the startup disk. Each has its own boxes for Hard disks, External disks, CDs, DVDs, and iOS Devices and Connected servers, and the Sidebar tab adds Cloud Storage and Bonjour computers. A USB drive that doesn't appear in Finder after you plug it in may only need External disks ticked. If it still doesn't show, the drive may not be mounting at all, which is a separate fault: see external drive not showing up on a Mac. Disk Utility lists drives whether or not Finder shows them.
Most people never need to browse the top of the startup disk. Their files are under their home folder, and the system folders are better left alone, so a Mac can easily have both Hard disks boxes unticked, whether from the start or after someone tidied the sidebar. Nothing is wrong when the disk is hidden, and showing it changes no data.
Browsing is safe. The top-level folders (System, Library, Users, Applications) hold what the Mac needs to run, so do not move, rename or delete any of them. Most of the system's own files are on the sealed volume and macOS won't let you change them anyway, but /Library and /Applications are writable, so take care there. Your own files are under Users, in the folder named after you. What each home folder is for walks through them.
Often the reason to open the startup disk is one file somewhere under it. Everywhere already covers the startup disk from /, system folders such as /Library included, so typing part of the name gets you there without the browse; ⌘↵ opens the result's folder in Finder. Files in Desktop, Documents and Downloads are only included once Everywhere has Full Disk Access.
Open Finder > Settings. On the Sidebar tab, tick Hard disks under Locations. On the General tab, tick Hard disks to show it on the Desktop as well.
Press ⇧⌘C to open the Computer window, or use Go to Folder (⇧⌘G) and type /. It is the top level of your startup disk.
The Hard disks box under Finder > Settings > General is off. Tick it and the disk icon appears on the Desktop.
The Hard disks option under Finder > Settings > Sidebar is probably off, or the disk was renamed and you're looking for the wrong name. Run diskutil info / | grep "Volume Name" to see its current name.
Everywhere keeps track of every file on your Mac, including the folders Spotlight hides and drives you have unplugged. Free for a day, then $19 once.
Version 2.20.3 · macOS 13+ · 4.7 MB · notarised