As you can see, magnets and disk drives do not mix well.
Your app comes with a utility called Activity Monitor, and it’s really useful for monitoring hardware and resource usage on your machine. The app is also useful for quitting apps on your Mac. To use it, launch it from your Applications Utilities folder and then click on the app in the application list that you want to quit. Drag windows to the corners and Magnet snaps them into quarters. Use side edges to arrange horizontal and vertical halves. Top edge to maximize, bottom makes thirds. Dragging to the top edge maximizes window size on a given screen. Keep your Mac desktop orderly with Magnet. You can drag windows to the sides or corners of your display to resize them. Dragging to a side edge resizes the window to occupy half of your screen. You can use Magnet's menu bar icon to choose a size and location for your current window.
Boot in Recovery or Internet Recovery Mode
For 10.6 or earlier boot from the DVD disk that came with your computer. Productitiy automation mac app.
For 10.7 or later: http://www.apple.com/osx/recovery/
See the Disk Utility steps in this article about when a question mark appears when you start your Mac
If Disk Utility cannot see the disk then it is hosed. If so post back for instructions on replacing the disk drive and attempting data recovery on your existing drive. Replacing it is not difficult. Recovering the data may be diffictult or impossible.
Best free mac apps 2018. In the future maintain current backups. Disk drives can fail anytime.
Magnet App For Pc
Time Machine Basics: http://support.apple.com/kb/ht1427
How To Use Magnet App Mac Download
Most commonly used backup methods: