Here’s what it looks like in single-user mode:Īfter many repeated attempts I was just now able to get the system to boot into hardware test mode with the install CD, but the short test showed no errors, even though the 30 lines are still on the display. I assume this means there is a problem with the video card or display. The little timer animation runs briefly, then stops, and the system just sits there.Īdditionally, there are 30 thick vertical lines on the screen, probably an 1/8th of an inch thick or more. Now it won’t boot up all the way it stops after showing a gray screen with an Apple logo on it. I was working with iMovie, put it into full-screen demo mode, and the display went nuts and the system locked up. My 2008 iMac running Mac OS X 10.6.x partially died last night. When you’re logged in, you’ll be logged in as the root user, which means you can do a lot of damage to your system, including deleting all of the files on the system.

If you don’t know what the commands in this article do, don’t use them, just take your Mac to an Apple store or Mac dealer. In this article I assume that you’re an experienced Unix administrator, so I don’t bother to explain each command. Warning: This article is about trying to accomplish some things in Mac (or iMac) single-user mode when your system is in trouble. Here, in the Sidebar tab, un-check and then re-check the “External disks” option, which will ensure that all connected disks show up in the Finder sidebar by default.Help keep this website running at ! In the top-left corner of your Mac, click on Finder in the status bar, and select “Preferences”.ģ. This is a better solution in the case that you have multiple drives that are missing from the Finder sidebar.Ģ. The second solution is to re-enable “External disks” from the Finder’s settings. Re-enable External Disks in Finder’s Sidebar Settings You should now see the hard drive that was missing from the sidebar back in it. Simply locate the hard drive that is missing from the sidebar, and drag it back.ģ. Here, you’ll see all mounted hard drives and network shares. Press “Shift + Command + C” to go to the top level of your Mac. Open up a new Finder window on your Mac by clicking on the Finder icon in the OS X Dock.Ģ. Drag the Drive Back To FinderĪn easy solution to solve this issue is to drag the specific drive back to the Finder sidebar. There are two possible solutions to this issue: 1. If this is indeed the reason, whenever you plug in or remove the specific drive, it won’t show up in the Finder sidebar. While there could be various reasons for this, the most likely cause for such an issue is that the specific hard drive may have been removed from the Finder sidebar.

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