FabioMorgado wrote:
Suddenly my mac started showing a folder icon with a question mark. I tried to follow the tutorial to recover using disk utility, but the system hard drive does not appear. I don't know how to proceed. Can someone help me?
Sounds like the drive has failed.
Probably more to say if only you mentioned what exact Mac is this...
Take it in—
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"
Genius Bar Reservation and Apple Support Options - Apple
Outside the USA
Contact Apple for support and service - Apple Support